Thursday, June 30, 2011

Comparison of all b-mobile SIMs

This post is now considered archived. The new post is here.

This post was last updated on March 17, 2013.

Japan Communications Inc. (JCI) offers the popular line of b-mobile SIMs cards. JCI is an MVNO using Docomo's FOMA 3G network and their 4G LTE network (3.9G, actually). JCI is also the MVNE behind VoIP provider BlueSIP and MVNO Rstream. Depending on your usage and needs, the b-mobile SIMs can be much less expensive than Docomo for the same quality of service. All B-mobile SIMs allow tethering at no extra charge.

If possible, before purchasing I recommend trying out their SIMs, which can currently be done at the Yodobashi Akiba in Tokyo all day Friday, Saturday, and Sunday, as well as Monday PM. There are other MVNOs in Japan, but I find their products not as compelling as JCI's. The data-only SIMs provided by Docomo can cause issues, but there is a workaround for rooted phones.


Overview of b-mobile SIMs


FOMA 3G SIM cards


U300


This is a prepaid data-only SIM that is limited to a 300 kbps. The one month version is popular among temporarily visitors because it can be purchased with cash and doesn't require residency status. However, the one month version is not (that I've seen) available in retail stores, though I've seen them in various small corner shops in Akihabara. These SIMs can be shipped to a hotel address and paid for COD. I've also seen them available on Ebay (for twice the normal price). There are also six and twelve month versions and micro and full size versions. This SIM card is known to have high latency that can cause relatively long delays when opening new connections.
More Information.

U300 Visitor


This provides the same service as the U300, except that it comes preactivated and has better support for English speakers. The original is no longer available. This is valid for 14 days and includes a 1) "14-day" U300 option or a 2) 14-day 1GB Flat Rate. This can only be shipped to Domestic addresses and is purchased via a credit card.
More information.

U300 TalkingSIM


This is postpaid traditional cellular phone service with 300 kbps data. It supports mobile number portability (MNP), so an existing phone number can be transferred to this service. Japanese law limits cell phones to residents. There is no micro talkingSIM - only a platinum micro talking SIM.
More Information. This SIM can be converted to the 1GB Flat Rate Talking SIM. This has a 3-month contract.

Platinum


Platinum SIMs are for iOS devices only and provide 1.2 GB of data per month. Speed is unlimited for certain predetermined apps (See note below the table). Other applications and tethered devices are limited to 300 kbps. There are prepaid data-only SIMs available to non residents and postpaid platinum talkingSIMs. Micro and full size versions are available
More Information.

Fair


The Fair is a completely unrestricted prepaid data SIM that is charged in 1000 MB units that are valid for either 1) 120 days (4 months) or 2) 30 days (1 month).

Four Month FAIR

This is not designed for heavy data users but can be very economical for those who only need 250 MB per month (a quarter of the charge). Having reliable access to wifi during the day is helpful to ration the bandwidth over a four month period. This is an option for short term visitors who don't mind paying more excellent coverage and speed. I currently use a b-mobile Fair SIM and have a series of posts under the "Fair data cap" label. Fair Micro SIMs are also available

ADDITION: The point at which the four month Fair becomes more expensive than Docomo depends on if you are comparing to the flat or tiered plans, between which there is about a 500 yen difference. Assuming the cheaper of the two prices, about ¥5,500/month, using 658 MB per month with the Fair will be more expensive than using Docomo. (I have only ever used 650 MB in a month with Docomo.)

Comparison to Docomo:
¥8,350 / 1000MB = ¥8.35/MB / ¥5,500 = 658MB

Comparison to Aeon Plan C:
¥8,350 / 1000MB = ¥8.35/MB / ¥4,980 = 596MB

This means that the Fair is not a good deal for someone who uses 650MB with a Docomo branded phone. Compared to the Aeon Plan C SIM, the Fair is not a good deal if you use about 600 MB per month.
More Information. I've written extensively on my experiences using the Fair. All related posts here.

1 GB Flat rate

After the initial 1 GB charge is used or 120 days passes, the FAIR can be recharged for ¥3,100 for 1 GB that is valid for 30 days. Be aware that the when being charged as a 30-day 1 GB product, there is only 10 days to add an additional charge before the SIM card permanently deactivates. Going back to a 120 day charge reextends the validity period to the original.
More Information.

1 GB Flat Rate


1 GB Flat Rate SIMs cannot be converted to a FAIR (thought the reverse is true), and the SIM expires 10 days after the charge is used up. Cost is about ¥3,500, though they were recently spotted at Costco for just under ¥3,000. This gives 1000 MB per 30 days.
More Information.

TalkingFair/Talking 1 GB Flat Rate


This adds a voice plan and requires a 3 month contract, though the contract has better terms than other carriers because it doesn't automatically renew. Early cancelation fee is ¥10,500. A 1GB Flat Rate talkingSIM (30 day recharge plan) would cost ¥4,350 per month
More Information on the Talking Fair and here for more information on the talking 1 GB Flat Rate SIM. The U300 TalkingSIM can be converted to the 1GB Flat Rate Talking SIM.

Yodobashi Zero-yen


Available exclusively from Yodobashi Camera. These are postpaid SIMs that are best for people who split time between Japan and another country. Currently there are no voice plans, data-only. From 0 to 100 MB, charges are incurred at a per-byte rate (¥37.8/MB) to 100 MB. (Billing increment is a byte, not a megabyte.) From 100 MB, a flat rate of ¥3,780 is charged until 1 GB. There is no charge at all during a billing cycle if no data is used. However, after 6 months on zero usage, the SIM card expires.
More Information.

Aeon


Data-only

There are three versions of these data-only SIMs. All are postpaid and only available at Aeon retail stores (current list [J] as a google map). The 100 and 400 kbps versions are similar to the prepaid U300 in that streaming is not allowed. The "carrier speed" version allows streaming. B-mobile VoIP service is possible with each of these SIMs. (See the Note below the table). Micro SIMs are not available.
More Information.

Voice

There are now voice plans available. 1-year contract required. Other terms are the same as the data-only SIMs. The table below shows a matrix of how these plans can be mixed and matched.
More Information.

Total minimum monthly cost
Voice Plan S Voice Plan M Voice Plan L
1,290円 2,100円 3,675円
Data Plan A 980円 2,270円 3,080円 4,655円
Data Plan B 2,980円 4,270円 5,080円 6,655円
Data Plan C 4,980円 6,270円 7,080円 8,655円

"Sumaho" (smartphone) SIMs


The primary difference between this and the Aeon is that the "sumaho" SIM carries a lesser contract requirement of only 3-months with a ¥5,250 early cancellation fee, compared to the Aeon SIM's 1-year, ¥10,500 requirement. Similar voice and data options are available. These are billed as post-paid, monthly recurring. See here for more information.

スマホ電話SIM
Voice Plan SVoice Plan MVoice Plan L
¥1,290¥2,290¥3,710
150 kbps ¥980 ¥2,270 ¥3,270 ¥4,690
1GB Flat Rate Data Plan ¥1,980 ¥3,270 ¥4,270 ¥5,690
2GB Flat Rate Data Plan ¥2,980 ¥4,270 ¥5,270 ¥6,690

Comparison of 3G b-mobile SIMs


SIM
Cost
Voice (1)
Speed
Tethering Speed
Data limit
Stream
(2)
Billing
Residency required
Availability
Payment method
Initial fee
SIM size
Notes
U300 1 month
¥2,980
X
300 kbps
300 kbps
Unlimited
X
Prepaid
No
Internet only
COD/CC
¥0
regular
Easy! Activation
14-day Visitor
¥3,980
X
300 kbps
300 kbps
Unlimited
(14 days)
X
Prepaid
No
Internet only
CC
¥0
regular
micro
Preactivated, English
1 GB Visitor
¥3,980
X
7.2/5.7 Mbps
7.2/5.7 Mbps
1000MB/14 days
O
Prepaid
No
Internet only
CC
¥0
regular
micro
Preactivated, English
U300 6 month
¥14,900 (¥2,483/month)
X
300 kbps
300 kbps
Unlimited
X
Prepaid
No
Internet / retail
COD/CC/cash
¥0
regular
Easy! Activation
U300 12 month
¥29,800
(¥2,483/month)
X
300 kbps
300 kbps
Unlimited
X
Prepaid
No
Internet / retail
COD/CC/cash
¥0
regular
Easy! Activation
Not recommended
Talking U300
¥3,960 (25 minutes)
O
300 kbps
300 kbps
Unlimited
X
Postpaid
3 month contract
Yes
Internet / retail
CC
¥3,150
regular
¥21/30sec
activation at purchase
Fair
¥8,350/1000 MB (min. ¥2,087/month)
X
7.2/5.7 Mbps
7.2/5.7 Mbps
1000 MB/120 days
O
Prepaid
No
Internet / retail
CC/cash
¥1,450
regular
micro
Easy! Activation
Talking Fair
¥8,350/1000 MB + ¥1,290 for 32.5 minutes (min. ¥3,400/month)
O
7.2/5.7 Mbps
7.2/5.7 Mbps
1000 MB/120 days
O
Prepaid data/postpaid voice 3 month contract
Yes
Internet / retail
CC
¥4,600
regular
micro
¥21/30sec
activation at purchase
1 GB Flat Rate
¥3,100
X
7.2/5.7 Mbps
7.2/5.7 Mbps
1000 MB/30 days
O
Prepaid
No
Internet / retail
CC/cash
¥380
regular
micro
Easy! Activation
Talking 1GB
Flat Rate
¥3,100/month + ¥1,290 for 32.5 minutes (¥4,390/month)
O
7.2/5.7 Mbps
7.2/5.7 Mbps
1000 MB/30 days
O
Prepaid data/postpaid voice 3 month contract
Yes
Internet / retail
CC
¥3,530
regular
micro
¥21/30sec
activation at purchase
Yodobashi Zero Yen
¥3,780 (¥37.8/MB to 100 MB)
X
"Carrier speed"
"Carrier speed"
1000 MB/30 days
O
Postpaid
Yes
Internet / retail
CC
¥3,150
regular
micro
Cancelled after
6 months no usage
online regisration
Aeon Data Plan A
¥980
X
100 kbps
100 kbps
Unlimited
X (3)
Postpaid
Yes
Retail only
CC
¥3,150
regular
activation at purchase
Aeon Data Plan B
¥2,980
X
400 kbps
400 kbps
Unlimited
X (3)
Postpaid
Yes
Retail only
CC
¥3,150
regular
activation at purchase
Aeon Data Plan C
¥4,980
X
"Carrier speed"(4)
"Carrier speed"
1.2 GB/month
O
Postpaid
Yes
Retail only
CC
¥3,150
regular
activation at purchase
Aeon Voice Plan S
¥1,290
O
N/A
N/A
32.5 minutes
N/A
Postpaid
1-year contract
Yes
Retail only
CC
¥3,150
regular
¥21/30sec
activation at purchase
Aeon Voice Plan M
¥2,100
O
N/A
N/A
75 minutes
N/A
Postpaid
1-year contract
Yes
Retail only
CC
¥3,150
regular
¥18.9/30sec
activation at purchase
Aeon Voice Plan L
¥3,675
O
N/A
N/A
~178 minutes
N/A
Postpaid
1-year contract
Yes
Retail only
CC
¥3,150
regular
¥14.7/30sec
activation at purchase
Sumaho 980
¥980
X

150 kbps

150 kbps
Unlimited
X (3)
Postpaid
3-month contract
Yes
Retail only
CC
¥3,150
regular
Online activation
Sumaho 1980
¥1,980
X

"Carrier speed"

"Carrier speed"

1GB/month

O
Postpaid
3-month contract
Yes
Retail only
CC
¥3,150
regular
Online activation
Sumaho 2980
¥2,980
X
"Carrier speed"(4)
"Carrier speed"

2GB/month
O
Postpaid
3-month contract
Yes
Retail only
CC
¥3,150
regular
Online activation
Sumaho Voice Plan S
¥1,290
O
N/A
N/A
32.5 minutes
N/A
Postpaid
3-month contract
Yes
Retail only
CC
¥3,150
regular
¥21/30sec
in store activation
Sumaho Voice Plan M
¥2,290
O
N/A
N/A
75 minutes
N/A
Postpaid
3-month contract
Yes
Retail only
CC
¥3,150
regular
¥18.9/30sec
in store activation
Sumaho Voice Plan L

¥3,710
O
N/A
N/A
~178 minutes
N/A
Postpaid
3-month contract
Yes
Retail only
CC
¥3,150
regular
¥14.7/30sec
in store activation
Talking b-micro SIM platnium (5)
¥6,260
O
"Carrier speed"
300 kbps
1.2 GB/month
O (5)
Postpaid
Yes
Internet / retail
CC
¥3,150
micro
iOS
activation at purchase
b-microSIM platinum 1 month
¥5,280
X
"Carrier speed"
300 kbps
1.2 GB/month
O
Prepaid
No
Internet / retail
COD/CC/cash
¥0
micro
iOS
Easy! Activation
b-microSIM platinum 6 month
¥29,880 (¥4980/month)
X
"Carrier speed"
300 kbps
1.2 GB/month
O
Prepaid
No
Internet / retail
COD/CC/cash
¥0
micro
iOS
Easy! Activation
b-microSIM platinum 12 month
¥56,160 (¥4,680/month)
X
"Carrier speed"
300 kbps
1.2 GB/month
O
Prepaid
No
Internet / retail
COD/CC/cash
¥0
micro
iOS
Easy! Activation
U300 micro 1 month
¥2,980
X
300 kbps
300 kbps
Unlimited
X
Prepaid
No
Internet only
COD/CC/cash
¥0
micro
Easy! Activation
U300 micro 6 month
¥14,900 (¥2,483/month)
X
300 kbps
300 kbps
Unlimited
X
Prepaid
No
Internet / retail
COD/CC/cash
¥0
micro
Easy! Activation
U300 micro 12 month
¥29,800 (¥2,483/month)
X
300 kbps
300 kbps
Unlimited
X
Prepaid
No
Internet / retail
COD/CC/cash
¥0
micro
Easy! Activation
TalkingSIM plantinum
¥6,260
O
"Carrier speed"
300 kbps
1.2 GB/month
O
Postpaid
Yes
Internet / retail
CC
¥3,150
micro
iOS
activation at purchase
  1. These are traditional voice options than have standard phone numbers and support mobile number portability (MNP)
  2. Streaming includes music, video and voice chat (youtube, skype, etc.)
  3. B-mobile's VoIP service is allowed with these SIMs, but relying on VoIP with a 100 kbps connection, while technically possible, is not recommended. Different hardware and firmware combinations may produce unexpected results, where sound is not routed properly (e.g., incoming voice being routed through the phone's back speaker, rather than the ear speaker). Service is not guaranteed to work properly on non-bmobile hardware.
  4. "Carrier Speed" is indicating that the connection speed is not limited from what Docomo customers enjoy, so in general, the speed of the unlimited Fair should be comparable to the Aeon Plan C and Platinum SIMs
  5. Platinum SIMs give carrier speed only to certain applications (visual voice mail and facetime are excluded):
    • Mobile Safari
    • App Store
    • Mail
    • iTunes (Podcast)
    • radiko (recommended 30 second buffer)
    • Mobile YouTube
    • Ustream live broadcaster
    • Mobile Google Maps
    • Evernote
    • Dropbox
    • Skype
    All other data is limited to 300 kbps
Xi LTE 4G SIM cards


These SIM cards all use Docomo's Xi LTE "3.9G" network. Maximum theoretical downlink speed is 75 Mbps in select indoor location. Maximum outdoor speed is 37.5 Mbps. Real speeds will be much lower. The advantage of Xi is not necessarily higher speed, but decreased latency and congestion. Xi feels more "responsive" than FOMA. Xi uses Band I (2100 MHz). No other LTE network in the world is currently using the same frequencies, so ONLY LTE DEVICES BOUGHT FROM NTT DOCOMO OR BMOBILE DIRECTLY WILL OBTAIN "4G" SPEEDS! All other devices will fall back to standard 3G. Latency and speed will be the same as with standard 3G.

Chameleon


This SIM card is available to non-residents. It is purchased initially for ¥5,800, which includes a 3000 MB charge valid over 21 days. After this initial charge expires, there are 3 recharge options. A SIM card that is not recharged within 10 days of reaching either zero bytes remaining or the end of the validity period is permanently deactivated.
More Information.

U300

This option costs ¥2,480 for 30 days unlimited data at a symmetrical 300 kbps speed. The biggest issue with the slow Aeon and U300 SIMs is not the slow uplink and downlink speed but the high latency that causes a long lag before any data download begins. Xi has much lower latency, so the Xi U300 when used in a Docomo or bmobile LTE device is expected to perform significantly better than the 3G U300.

High speed LTE

This option costs ¥5,400 for 5000 MB valid for 30 days at best effort LTE speeds. Like the 1GB Flat Rate, this is probably proxied. Of all bmobile plans, this one provides the best value for a large amount of data but is not significantly cheaper than a standard carrier data plan. This would be of interest to people with a 3G device that don't want to have a 2-year, auto-renewing contract with a Japanese carrier.

FAIR

This provides 1000 MB valid for 120 days at a cost of ¥8,800 and is a good option for people who 1) spend a lot of time near wifi and 2) need a reliable, fast connection when out of wifi range. The "Fair" line of SIMs are the typically the fastest of bmobile's offerings, but are priced significantly higher than the corresponding proxied service. This likely has a public unique IP address, like the 3G Fair.

Amazon 4G


This is a monthly, recurring service that provides 500 MB of LTE 4G data for ¥1,980. An additional 500 MB charge may be purchased, but remaining data does not roll over to the next month. This is not for temporary visitors to Japan - address verification is required. SIM is purchased first from Amazon for ¥3,150, which contains no charge. The SIM is then activated with on the b-mobile product page. The SIM card is permanently deactivated if service is cancelled, though there is no cancellation fee.
More Information.

Amazon/Yodobashi Pair GB


A 2 GB data plan is split between two separate SIM cards for ¥2,970/month, less than the cost of their 1 GB flat rate 3G SIM. Regular size and microSIMs can be mixed. A retail package containing two SIM cards costs ¥3,150 from Amazon or Yodobashi. At the time of purchase, the SIMs are unactivated and have no charge. A credit card must be used to add a service plan for ¥2,970/month. If 2 GB is exceed in a month, additional data can be added at ¥525/100 MB. As far as I can tell, the SIMs are permanently deactivated if service is cancelled. Address verification required.
More Information.

Comparison of 4G b-mobile SIMs


SIM
Cost
Voice
Speed
Data limit
Stream
Billing
Residency required
Availability
Payment method
Initial fee
SIM size
Notes
Chameleon U300
¥,2480
X
300 kbps
Unlimited
X
Prepaid
No
Internet / retail
CC/cash
¥5,800
3000MB / 21 days
regular
micro
Easy! Activation
Chameleon High Speed
¥5,4000
X
75 Mbps
5000MB / 30 days
O
Prepaid
No
Internet / retail
CC/cash
¥5,800
3000MB / 21 days
regular
micro
Easy! Activation
Chameleon Fair
¥8,800
X
75 Mbps
1000MB / 30 days
O
Prepaid
No
Internet / retail
CC/cash
¥5,800
3000MB / 21 days
regular
micro
Easy! Activation
Amazon 4G
¥1,980
X
75 Mbps
500MB / 30 days
O
Postpaid
Yes
Internet
CC
¥3,150 (0MB)
regular
micro
Online registration
Amazon Pair GB
¥2,970
X
75 Mbps
2000MB / 30 days
O
Postpaid
Yes
Internet
CC
¥3,150 (0MB)
Mix, match regular micro
2 SIM cards
Online registration
Yodobashi Pair GB
¥2,970
X
75 Mbps
2000MB / 30 days
O
Postpaid
Yes
Internet / retail
CC
¥3,150 (0MB)
Mix, match regular micro
2 SIM cards
Online registration

Activation methods

There are presently four different methods for activation.
  1. Easy! Activation Requires a Japanese mobile phone or PHS (English option available).
  2. Activation at time of purchase
  3. Online registration
  4. Preactivated
Easy! Activation is typically done for prepaid data-only 3G FOMA SIMs. Activation at purchase happens with the TalkingSIMs. If purchasing at a store, this happens immediately. If purchasing online, ID must be scanned and sent to JCI when applying for a talkingSIM. Online registration is required for the newer SIMs, such as some of the LTE SIMs and the zero-yen SIM. The SIM arrives in the mail unactiavated and with no charge. SIMs requiring online activation are postpaid and typically billed at monthly recurring intervals (except for the zero-yen when there was no usage during the month) There may be an additional step of verifying mailing address by entering a PIN code from a post card sent by JCI. Finally, preactivation is only for the visitor SIM. A large complaint from tourists was having to find a Japanese mobile phone to activate U300s or 1 GB Flat Rates.

Troubleshooting


Please see here for the cell standby battery drain fix before considering to buy a bmobile data-only SIM.

NOTE: So far I've got several reports of Motorola phones with Android 2.2 not working with bmobile SIMs. Before buying a SIM for a Motorola phone, if at all possible, please try it first to be sure it works.

The U300 and Fair use a unique public IP address. While it shouldn't matter for most people, the Flat Rate 1 GB is behind a proxy. Other SIMs are likely behind a proxy. This post indicates that the Aeon 100 kbps SIM is behind a proxy, so I assume that the other versions are as well. I have been told by devs that the talkingSIMs have some "closed ports", which I interpret to indicate a private IP address. I understand that the platinum SIMs are technically very similar to the Aeon Plan C SIMs, so I am assuming the Platinum SIMs are also assigned a private IP address. The easiest way to confirm this is to use MyIP or run netcfg from an adb shell or terminal emulator window and look for an IP of the form 10.x.x.x, which means you have have a private IP address. (Public vs. private IP addressing could theoretically change since public IPs are not guaranteed in the terms of service.)

There are several important points to consider before buying a b-mobile SIM. If you can visit Tokyo, the Yodobashi Akiba store in Akihabara has a demonstrations of b-mobile SIMs on Friday, Saturday, and Sunday, plus Monday afternoon. You can slip a SIM in your phone and see if it works. (The Shimbashi Yamada Denki demo corner has been discontinued.)
  • The phone must be unlocked or be Docomo branded (Docomo phones don't need to be unlocked)
  • Only a handful of phones are officially supported (see links in table)
  • Unsupported phones may not work at all
  • Unsupported phones may work but with several issues including:
    • No 3G icon (Nexus One with with 2.3)
    • No 3G icon and no signal bars (ht-03a with 2.2)
    • "No network connection" error message popped up by browser (does not affect browsing)
    • Some apps may not use background data because of an apparent lack of internet connection
    • Excessive battery use by radio searching for a signal
  • Newer versions of Android work best
  • Thre is a patch for rooted phones to give a signal icon
    • No risk of "bricking" an already rooted phone
    • May not completely fix issue - data network may still be unknown but does fix battery drain
By far, the most common problem that I see comes from Android users thinking that the SIM is not working when it actually is. With Android it is probably working if all of the following happens:
  • NTT Docomo and "emergency calls only" are displayed on the lock screen and/or the pulldown notification bar
  • There are no SIM card error messages and there is a "080" phone number (viewable from settings)
  • Browser redirects to the b-mobile site (wait longer for activation to complete)
Most Docomo smartphones work with no problems (see the table below for links to supported phones), and the list of phones that have been confirmed not to work is relatively short. The exact reasons why some hard/firmware combinations don't work is not well understood, even by developers and hardware makers. One reason seems to be that the SIMs, as provided by Docomo, lack a circuit switch component. I understand that data-only SIMs of overseas carriers often include this component. It seems that Android wasn't originally designed with data-only SIMs in mind. It is possible that a particular phone that does not work with the b-mobile SIMs, will work if the firmware is changed or, especially if it is updated to 2.3 Gingerbread.

Hard/firmware combinations confirmed not working

  • HTC phones with Android 1.6 Donut.
  • Motorola Atrix (requires this fix)
  • Acer Liquid A1 with 2.2 (see here for fix that requires root access and the ability to mount /system as writeable)
  • Based on comments below, it seems the Motorola Droid 2 Global on 2.2 may also not work without the above Atrix fix.

125 comments:

  1. ht03a→atrix tokyoJune 30, 2011 at 10:36 PM

    actually at docomo waiting in line to cancel my data plan when i read your post...saw that you put atrix into the "doesn't work" category - solidifying my plan to go "wifi" - ¥3600/mo for wimax via a j:com campaign + 1 month free and only ¥5000ish to cancel the 1-year contract...testing how it will "feel" to carry a wifi mobile hotspot (what the hell is this called in normal English?!?!) now with a emobile pocket wifi...feels OK so far.

    have to try b-mobile fair again after going to 2.3, maybe that will help.

    ReplyDelete
  2. What do you guys think about the NTT DoCoMo Xi mobile wifi. Right now I think about getting a L-09C mobile wifi router.
    Thx
    Christian

    ReplyDelete
  3. There is a bit of circular logic going on here. ;-) The reason I put the Atrix in the doesn't work category is because use convinced me it doesn't work. If you just said that there were no signal bars or no 3G icon or something like that and then never replied, I'd be left with the impression that it probably worked but you didn't realize. But, you described SIM error messages and the lack of "NTT Docomo" showing up, which is definitely indicates a serious problem.

    I am curious to see how it does with 2.3. I understand that there were improvements made to the base code wrt data-only SIMs. Also, if there are any custom ROMs available, it would be interesting to try those. If one is based on stock, I bet it would work with b-mobile.

    ReplyDelete
  4. I'm not sure this is the place to ask this but i've been wondering if these MVNO's are using the same foma network as docomo phones, are they not subject to the same port blocking that Docomo does to its own phones to stop people using skype and the like? Or is part of the deal that they have to provide unrestricted access to the MVNO's if they want it?

    I'm enjoying my SII on Docomo but the inability to use voip with skype or Gtalk etc. is galling.... -_- AU and softbank let us Docomo, why not you too?

    ReplyDelete
  5. Check the table column called streaming (and note 2) for the answer.

    ReplyDelete
  6. Thank you soooo for this useful post! Yesterday I readed all the articles you posted under the "b-mobile" tag but with this new one I definitely understood it better =)

    I have just a few questions to ask:

    I have an Acer Liquid, do you think or know that prepaid sims like the fair unlimited speed and the U300 will work? and, about the fair unlimited one, I readed some articles ago that someone told you that if we finish the 1gb before the end of the 4 months we will still have the connection but the speed will be limited, is that right? I don't actually know how much bandwitch I usually spend so I don't know if 250mb a month will be enough for me, I just know that when I used to be softbank I payed around 5800 yen for the smartphone plan but that in the bill it showed that in the "reality" I actually spend something like 200,000 yen of data. Don't really know how many gb/mb would equal 200,000yen on softbank's price list though..

    Also (ok you are gonna hate me know so I swear this is the last one) you said that with fair unlimited speed sim card it costs ¥8,350 for 1GB (around 2087 yen a month = 250mb a month) but on the site it also shows that we can actually use 500mb a month but I can't really understand well how. Are we supposed to recharge the sim after 2 months (instead of 4 months late) to do that? Of course if it's true that "after the 1gb bandwitch ends we can still get -free- connection but with limited speed" I won't need to do that ^^

    I am sorry if my questions look stupid but I hope you will still be willing to answer to me ^.^

    Anyway tomorrow I will try to go to Akihabara's Yodobashi to check the sim on my
    Acer Liquid, just to make sure that it works ^^ Yesterday I went to
    Koshigaya Laketown's AEON but they told me that prepaid one is available
    only online T.T

    ReplyDelete
  7. Glad this was helpful.

    I haven't seen any indication that the Fair will work once the charge is used up. My guess is that it won't. Do you have a link to where you read this?

    I edited the post to add the point at which the fair gets more expensive than docomo. (about 650 MB/month). The most I have personally ever used in a month while I was using Docomo was exactly 650 MB. Most of the the time I used much less.

    Regarding charging of the Fair you have to charge it in 4 months or after 1000 MB of usage, whichever comes first.

    On you SB bill, there should be also the number of packets you used. 1 packet is 128 bytes.

    I think SBM is basing that ridiculous amount of money on 0.08 yen /packet. If so, then you would have used 2,500,000 packets

    2,500,000 packets * 128 = 320,000,000 bytes / 1024 = 312500 kb / 1024 = 305MB

    So, the Fair may not last you for the full 4 months, but it will save you a lot of money (if you really are only using 2.5 million packets). You would have to charge it at the beginning of the 4th month. Based on the recharge cost of ¥8,350, you pay ¥8.35/MB. So at 305 MB per month for example, you would only pay about ¥2,500 per month for data with the Fair SIM.

    Keep in mind that if you all of a sudden start using massive amounts of data, you can go through 1 GB in a hurry and have to recharge. For example, the new google+ app has the option to automatically upload every picture you take on the phone. If on picture is 1 MB and you take 10 pics a day, That would add an additional 300 MB to your monthly usage, which is double and would make it not worth canceling the SBM plan.

    All Aeon SIMs are postpaid.

    HTH.

    ReplyDelete
  8. http://www.bmobile.ne.jp/fair/faq.html#q20

    I missed this before

    Q:通信中に残データ量が無くなったらどうなりますか?
    A:すぐに切断することはありませんが、強制切断を行う場合もありますので早めにチャージをご利用ください。

    Q:What happens when I use up my charge while transmitting data
    A:You won't be disconnected immediately, but in some cases you can be forcefully disconnected, so please charge the SIM as soon as possible (to enjoy uninterrupted service.)

    What it really means: I don't know. Sounds like you'd probably be able to use if for a while but no for very long.

    ReplyDelete
  9. Thank you for answering me =)

    Unfortunately I don't have the link where I readed about the "after 1gb is over" thing, I used my husband's Iphone to browse it yesterday (and I tried to read as much links as possible) so I can't really tell where I readed that part =(

    I readed the addictional point you added in the post, thanks ^_^

    I changed to docomo around 4 months ago (I used to be softbank and I really regret changing because of the price T-T Well, still 1 year and 8 months to go LOL) and I don't have bill's statements anymore so I can't really check how many packets I used but I remember that in the latest ones it was written that I spent around 200,000 yen for packets.

    And thank you thank you thank you for showing me how to calculate MBs based on packets (I checked softbank's website and it says 1 packet is 0.08yen per packet, just as you said).

    So "normally" I spend "only" 305MB / month...I though it was worse =P If that's the case then Fair Sim Card is definitely what I need (even if it won't last 4 months it will still last at least 3..and will be cheaper than docomo and softbank anyway).

    Thank you also for telling me about the google+ app, I actually don't use that and also I have the habit to deactivate the autosynch because of the low battery life so it won't be a risk for me ^^.

    ReplyDelete
  10. If the data limit on these 1.2gb/mo packages is reached, will customers be charged per mb/gb of data over their normal cap? Or will they simply be cut off?
    1.2 gb is an easy wall to break

    ReplyDelete
  11. I actually used Tango to make video call over IP using the new Docomo SH-12C, and it worked fine.
    Are you sure that Skype etc is blocked?

    ReplyDelete
  12. Sorry it seems you're right, I swear it didn't work when I tried it the other day but maybe I was just being an idiot.

    Its on Docomo's not allowed list though isn't it? does that mean excessive use (or any use) risks not being included in the packet-hodai? I wonder how much would be excessive?

    Well anyway thanks, will be useful to make to odd skype call.

    ReplyDelete
  13. I think there was a discussion related to this last Oct-Nov on this blog.

    Going by other user's experience, it should not be charged separately and will be included in packet-hodai itself. That is assuming that you have not unintentionally tampered with the APN settings.

    Excessive use, I am assuming would be the same limits that they caution for most data connections (I think around 300MB in a day)

    ReplyDelete
  14. Mkd, you're right about the discussions on tethering. Thanks for pointing that out. That discussion comes up about as often as b-mobile questions, which means I guess it's time to consolidate all the information into a new post.

    Bottom line: there are numerous ways for them to tell if you are tethering, but aside from extremely flagging heavy bandwidth consumption, it requires resources to look for tethers with TTL and packet inspection, etc. So, given the overhead, there is a balance between revenue lost from tethers and overhead required to look for tethers. 

    Since we've heard no stories of people getting slapped with charges by docomo, that would suggest that the cost of looking is higher than the money they think they recoup. 

    Two things can change: 1) the number of people tethering and the total amount of bandwidth they consumed or 2) the amount of money they think they will recoup. Will they? Who knows. If they do, could a high bill come your way? Perhaps just maybe it might. 

    ReplyDelete
  15. Ok this is my report for the Fair Sim Card:

    I went to Akiba's Yodobashi 2 days ago, I tried to sim on my Acer Liquid A1 (Froyo) and it didn't work. The b-mobile staff helped me so much by trying to make it work for 1 HOUR (I am seriously in love with the girl of the shop right now..I wanted to hug her 'cause she was soooo kind to me).

    Anyway it didn't work so she finally searched on google to see if there was a solution for that and together we found out that the problem was the Acer Liquid + Froyo combination. Infact in Froyo's OS there must be the lack of something as the guides on "how to make acer liquid a1 work with froyo" explain that if we can extract some modules from eclair and put it on froyo then the sim will work.

    So she emailed me the links with the guide and I did everything that was written on the site..and went back on the shop yesterday morning.

    This time the sim worked =) So I bought the sim card and left.

    I used the phone a little yesterday (watched some site etc) and the bcharge app says that I have 991mb left ^^

    I will try Acer Liquid + Gingerbread combination someday this week, I will write a comment here again as soon as I do it ^^

    So basically what I wanted to say is that Acer Liquid A1 + Froyo doesn't work (it works only if we replace some modules with eclair ones).

    Here is the guide I followed to make it work: http://kazpard.seesaa.net/pages/user/iphone/article?article_id=168746113

    ReplyDelete
  16. This is incredibly helpful. Thanks for taking the time to do this. 

    I have one really simple question.  Do these data only sims like the fair or the U300 come with a mobile email addresses? So, for instance, would I be able to use the messaging application on my phone to send and receive mobile emails?

    ReplyDelete
  17. Sorry, to specify: NTT DoCoMo does in fact show up as the network on my phone, and the phone number from b-mobile seems to have taken, too. When I go to Phone Properties it shows those things. What I don't get is service.

    ReplyDelete
  18. try the username bmobile@u300 rather than bmobile@fr that is for platinum. and you said you are using fair.

    ReplyDelete
  19. Hi Nicholas, thanks for the suggestion! I tried the u300 username too, but it unfortunately didn't work.

    The b-mobile help desk team confirmed that the bmobile@@fr  username was correct for the Fair- it's also on their site here: http://www.bmobile.ne.jp/fair/setting.html

    Unfortunately beyond that the help desk was not actually any help- because the Droid 2 is an American phone, they said they couldn't support it.

    ReplyDelete
  20. I hope I can help ^^"

    You should also try bmobile@sw as apn...it's one of the apn that the Yodobashi Camera Akiba's shop staff tried on my phone.

    Also which version of android do you have on your phone? 'cause for example Acer Liquid + Fair doesn't work with Froyo and Gingerbread unless you change the file "libril-acer-1.so" on system/lib with the one of eclair's version.

    ReplyDelete
  21. Are you sure the Droid 2 supports W-CDMA? Dual mode in that sense is very rare. au offer phones with GSM support but true global is rare. The Milestone 2 is the W-CDMA version of the Droid 2, no?

    (My point is that there is no GSM in Japan so if the phone supports global roaming through GSM you are out of luck).

    It can read NTT docomo and the phone number from the SIM, so that doesn't necessarily mean that it is connected to the base station (making it a SIM issue).

    ReplyDelete
  22. I can confirm that bmobile@sw will also work with the fair SIM. I have used both bmobile@sw and bmobile@fr. I haven't had a chance to look into the lib file Alessia mentions, but that is on my list to do. I want to know exactly what is the problem with some of these phones.

    So a few points for clarification

    I understand that:
    1. The phone number shows up in settings/about
    2. Ntt Docomo is displayed
    3. Out of service is displayed

    Some questions:
    1. Is "Emergency calls only" displayed on the lock screen or the notification bar when pulled down?"
    2. What Android version?
    3. Do signal bars display at all?
    4. If the signal bars do display, are they green (on gingerbread only - disregard for froyo).
    5. Is bootloader security off allowing /system to be mounted rw and do you have root privileges?
    6. Does the browser throw up a no connection error?
    7. What happens when you hit OK?
    8. Did you google PW get cleared when you added the new SIM?

    ReplyDelete
  23. Hi Alessia! Thanks for your note!

    I tried bmobile@sw but it also didn't work. My phone is currently running 2.2 but it's a Motorola phone so it doesn't have that library. I can try to find a corresponding library though!

    ReplyDelete
  24. Hi SBSdroid, thanks very much for your help! Here are the answers to your questions:

    1) "Emergency calls only" is not displayed. Both the lock screen and the notification bar say "NTT DOCOM | NTT DoCoMo."
    2) I am using Android 2.2.
    3) No signal bars display- there's a red "no" symbol over them.
    4) (no bars)
    5) I have root privileges through the z4root app. I'm not sure if bootloader is on or off.
    6) The browser does throw up a no-connection error.
    7) I am not sure which OK you are talking about, but when I select the "DoCoMo" network, nothing happens. It just returns me to the main Wireless and Networks options screen.
    8) No, my Google PW did not get cleared at any time. It keeps failing actually and I have to get on the wifi to put it back in.

    ReplyDelete
  25. Sorry to reply to myself here but the REPLY button didn't appear for the SBS comment on my comment.

    Verizon can be somewhat schizophrenic. They refer to UMTS on Droid 2 global page also but all their marketing copy is as below:

    *****
    QUAD BAND GSM GLOBAL ROAMING
    Whether across the country, or across the world. This DROID never stops doing for you.
    ****

    If the device definitely does support W-CDMA, then try changing your network authentication method to PAP OR CHAP. That has been known to fix some issues with b-mobile SIMs on some of the Japanese sites.

    ReplyDelete
  26. Just changed maxed threading sitewide to 4. And I deactivated disqus's @mentions because if there is anyone with the the disqus username fr or sw, that guy is gonna hate this thread. ふふふふ。

    ReplyDelete
  27. I'd hope that isn't the case. I guess there is also no guarantee that there aren't multiple revisions with different basebands... I am not at all familiar with the handsets available in the US.

    ReplyDelete
  28. After hitting the OK to clear the network connection error (or whatever it says) message that comes up with the browser. Just want to confirm that the page didn't actually load, which is what happens on my N1.

    I just want to clear the usual suspects before moving into more complicated stuff. Check what was mentioned above by likethesite. You need to confirm that this phone does indeed support UMTS-2100 (I think it does).

    ReplyDelete
  29. Just wanted to add that this summary you have done up is fantastic. Very useful.

    ReplyDelete
  30. Hi Likethesite,

    Thanks very much for helping! I am pretty sure my phone will work in Japan, and here is why: I have a prepaid Softbank SIM that I got with another phone way back in the day. All the money on it is depleted, but I have gotten that to work on my phone such that it can receive calls. Here's how:

    I inserted the Softbank SIM.
    I went to Wireless and Networking in Android. There are three choices for Network Mode: Global, CDMA, and GSM/UMTS. I selected GSM/UMTS.
    No additional access point data etc was required.

    Having done that, I get bars from Softbank and the phone can receive calls to the number of the Softbank SIM. So I think it's safe to say that the phone will work in Japan, just not necessarily on b-mobile.

    I should also note here that when I select CDMA mode, there are only two suboptions, both regarding Roaming mode. I can set them to "Home Only" or "Automatic." Selecting "Home Only" gets me nowhere. Selecting "Automatic" gets me Roaming with very limited capabilities (can receive texts and calls, can't call or text, no data).

    Does any of that help? Thanks very much for helping me!

    ReplyDelete
  31. Also: if I select GSM/UMTS mode, I am given suboptions for:

    1) either GSM only, UMTS only, or both
    2) manually selecting an operator (weirdly, when using either a b-mobile or softbank sim, i always am given options for Docomo AND softbank)
    3) access point names

    ReplyDelete
  32. Even further, when inputting the b-mobile APN information, I set the authentication method to "PAP or CHAP."

    ReplyDelete
  33. OK, First, don't use CDMA that is different. It is a little bit confusing and confused me at first, but the 3G version of CDMA is essentially CDMA-2000. The 3G version of GSM is W-CDMA, which is where the confusing comes in. UMTS is, for our purposes the same as W-CDMA.

    Next, since there is no GSM, select only UMTS.

    The network operator will be Docomo. It is not strange that you also see softbank, since they are also using UMTS-2100. If it supported 1700, you'd also see Emobile showing up. B-mobile won't show up because they are a virtual operator on Docomo's real network.

    ReplyDelete
  34. OK, I selected UMTS only, and then picked "JP DoCoMo 3G (44010)" as my network operator. But sadly there's no change.

    ReplyDelete
  35. Connor

    I would recommend you do the following:

    Do UMTS only. Select docomo as the operator and in the APN choose "PAP or CHAP" as your authenticaiton mode.

    Also, what city are you in? If you are in docomo's BAND VI (800MHz (FOMA PLUS)) area (i.e. outside of urban area) then that prolly won't work on a US BAND V (850MHz) phone.

    ReplyDelete
  36. Hi Likethesite,

    Thanks for that! I made those selections but frustratingly I get the same result. I'm in Tokyo right now and have no plans to leave the city. It is very strange that it would work with the Softbank SIM but not this one! I don't get it!

    ReplyDelete
  37. Hi Likethesite and SBSdroid,

    Thanks very much again for helping me! I really appreciate you trying, but I think I am about ready to throw in the towel- do you think it's even worth it to take it to the Yodobashi in Akiba, or just figure out how to sell it?

    ReplyDelete
  38. This would be a prime example of potential issues surrounding
    fragmentation on Android. The stock AOSP code works, though not
    without issues that seem to come from Google's lack of thought
    regarding data only sims and the exact structure of the sims provided
    to bmobile by docomo.

    But for reasons that it appears aren't crystal clear to even people in
    the business, some hard / firmware combinations have more issues than
    others. Gingerbread by far works better than the previous versions.
    Hopefully as Android matures, these issues will go away. I am hoping
    the next version completely fixes these issues.

    As I mentioned on G+, if it just won't work at all and you're not
    comfortable modifying your phone in the hope we can make it work, I'm
    sure there is someone around who would be interested in buying your
    sim.

    ReplyDelete
  39. Send me an email.

    ReplyDelete
  40. This post is a goldmine. Thanks a lot for consolidating all that information.

    ReplyDelete
  41. I got an Atrix a couple of months ago, it is an AT&T phone that has been unlocked.

    I got a b-mobile sim and experienced the exact same symptoms that you describe, also running Android 2.2

    I could put a prepaid softbank voice sim in, that works.

    The data only ones are the problem, exactly like you.

    I upgraded to Android 2.3 today, but I no longer have the b-mobile sim. I got so frustrated I tossed it in the trash, it was making me angry that I could not get it to work. I tried b-mobile support, they had no clue.

    I went to e-mobile and got one of the guys to give me a sim to try, no luck (they also had no clue).

    I've just been using wifi at home and work, but now that I have 2.3 I have hope again. I would really like a Aeon sim for 980 which would be good enough for me.

    Has anyone tried any data only service in Japan now with 2.3 available?

    ReplyDelete
  42. I can confirm (as I used it long for months), that a Motorola Milestone 2 worked with a bmobile U300 SIM card. However, the 3G icon never showed up (but download speed was about 300 kbit/s) and internet connectivity was often not working on the first try (but always some seconds later), which makes me think the phone did disconnect from the cellular network. As incoming calls/traffic never happened, this does make sense.

    I now use a bmobile talking SIM and all small issues are solved: 3G icon is on, network always works, and of course talking is ok now too.

    ReplyDelete
  43. Forgot one annoying thing: Thethering did not work with the data-only card, but works just fine with the talking SIM card. No idea why, but it was very reproduceable.

    ReplyDelete
  44. Great post - I am just visiting Japan and trying b-mobile's Fair SIM for the first time, with my Galaxy S Android (T-Mobile Vibrant) unlocked.

    The connection works okay - except the caveats in the post such as "No network" dialog in the browsers.

    There's also one major drawback, at least when used with Android 2.3 apparently - the phone thinks there's no network, and "Cell standby" hoses the battery, trying to find a better network. To me this reduces the whole battery life up to 50%. http://picplz.com/user/miyagawa/pic/hf2wn/

    I searched for the (Japanese) web and found that the workaround is to buy talking SIM because that way you actually will have the cell network with voice, but that's absurd, and require residency in Japan etc. Hope this bug gets fixed in the Android mainline. I published this issue on my g+ post and seems lots of people are affected, not only Nexus phones.

    ReplyDelete
  45. Funny thing is, the same thing happens to my unlocked European Xperia Play with a regular AT&T sim. In fact, my "Cell standby" meter is *higher* than my "Display" meter. But I still get about 6.5 hours of heavy use, which is longer than my previous Droid. Of course I have a voice plan that works and everything. The only issue I can think of is that it's a European phone, set with the AT&T APN. The phone supports AT&T frequencies, I get HSPA.

    ReplyDelete
  46. Thanks for bringing this up. Thing is I never really noticed because I've only ever used this n1 with bmobile or on ATT. It is a t-mo version, so on EDGE on ATT. I have never had both voice and 3G. So I never had anything to compare with. The battery drains fairly quickly, but I am using it a lot and it is an old battery. I hadn't considered this.

    ReplyDelete
  47. Tethering does work using data-only simcard. I tested running YouTube on my iPhone 4, tethered to my Galaxy2 (2.3.3). Speedtest app doesn't seem to work though, probably because data-only simcard is not fully supported on android phone yet.

    ReplyDelete
  48. I can compare - when I use this phone in US with the regular T-Mobile's 3G, the battery lasts for 10-12 hours with the normal use. With b-mobile's data only SIM and high cell standby drain all the time, it's 5-6 hours. It's that bad.

    My workaround so far is to turn on Airplane mode whenever it's connected to WiFi. There's a lot of apps on Market that automates this with screen lock or scheduling. Also, charge the phone whenever i'm near the power source :)

    ReplyDelete
  49. Is there any reason a UK HTC incredible S *wouldn't* work on the Talking Sim plan?

    Just about to buy one, so if there are any problems it'd be good to know now! ;-)
    http://en.wikipedia.org/wiki/HTC_Incredible_S

    ReplyDelete
  50. Put the Nexus S in the "lots of issues" category. Has all the problems listed in the post and the battery life was not just bad but *really* bad, and the phone stayed warm all the time.

    ReplyDelete
  51. Hi! I just bought my u300 sim and when I place it in my Nokia E61 (a supported phone on their list), it says "SIM CARD REGISTRATION FAILED". Any ideas on what to do? I emailed the helpdesk but they still haven't replied.

    ReplyDelete
  52. Do I have to do anything before being able to use the sim card? Or do I just put it on my phone and start using? Am I missing a step like actiation/registering or something? Thanks!

    ReplyDelete
  53. Have you activated the SIM by calling with a cell phone to the activation number? Do you have another phone to try it in? I am not sure what else to suggest.

    ReplyDelete
  54. Hate to plonk this question in the article, but figured it'd be a good place. I'm attempting to order the b-mobile U300 Micro Sim for my one month visit, and used my very limited Japanese knowledge to fill out the order form. I am however stuck on the Contact Phone number...obviously I don't have a Japanese phone number hence the purchase, but it's asking me to input one. Was wondering if I should just put in a fake 0900000etc.? I'm having the SIM sent to a Tokyo address but would prefer not to give her phone number to save her more hassle :) If I must, I could though. Any advice would be much appreciated, this website is a godsend. What would I do without the internet!

    ReplyDelete
  55. Thanks very much for this fantastic post. Very useful.
    One quick question. Although Platinum is only iOS device, can I use it with SIM card adaptor and use in Android device?
    Thanks in advance for your prompt answer.

    ReplyDelete
  56. I doubt if there would be any restriction at SIM level. I currently use my iPhone micro-SIM with adapter in Android device without any problem (ofcourse after setting correct APN, mail settings etc)

    Best would to try it out at the Yodobashi store in Akihabara. The lady is really helpful and would let you try anything. (She let me check the SIM on JB iPhone devices with complete knowledge that it was JB)

    ReplyDelete
  57. Awesome post, thanks so much for the info.

    I will be going on exchange in Kyoto for 6 months, and will be getting a phone there.
    It appears that Docomo's data plans are ridiculously expensive, and I'm thinking of just doing the ¥2k value plan (voice only) without any data plan when getting my phone.

    I would like to ask if anyone happen to know whether b-mobile FAIR SIM is compatible with Docomo's AQUOS PHONE f SH-13C (Android 2.3, uses microSIM)? This model isn't in b-mobile's officially supported models list =(

    ReplyDelete
  58. I can't say. There is another Fujitsu phone... But the only way to know is to try it or google it in Japanese and see if anyone else has.

    Is it worth buying a phone from Docomo with no subsidy for only a 6 month stay? Maybe it would be better to get something cheaper?

    ReplyDelete
  59. Yeah it's expensive, but I don't have a smartphone atm and would probably need it to prevent getting lost etc. =/

    As for that phone, I'll see if I can try the SIM before buying it -- but it seems like the only place to do that is in Akiba...

    ReplyDelete
  60. Hi Everyone,

    Several months later I was finally able to get my Droid 2 Global working using these instructions: http://zxxiziii-mikkabouzu.blogspot.com/2011/08/b-mobile-sim-u300-on-atrix.html. That link is for the Motorola Atrix but it works on D2G as well; I saw a frustrated Atrix owner on this thread and this seems like his fix!

    The problem seems to be that the APN information won't take if you put it in through the normal interface, so you actually have to manually alter a file called /etc/ppp/peers/pppd-ril.options.

    I did that with the Market app "Root Explorer" and now everything works. As SBS noted originally, my phone still shows No Service and there's no UI indication given that the phone is even connected. But the internet works.

    ReplyDelete
  61. Just to add my findings, the Talking U300 sim seems to work fine in an HTC incredible S.

    I bought it direct from the website (with help for the japanese) and it was delivered the next day. though it doesn't activate for 2 days.

    When I first put it in it wasn't working at all - i was just about to call their helpline when i put the back cover on and the voice/network connected right up - i guess the incredible S has it's aeriel in the back cover then.
    One weird thing was that although voice then worked fine, and I'd entered the data information (APN), the data didn't work for about 10 minutes, then suddenly kicked in. Don't know if that was my fault too.

    I mostly have a HSDPA connection, although today it seemed to often switch between that and 3g. Not sure why that started.

    The speed of the u300 seems fine for may apps, and sites like the bbc mobile site - but it's kinda slow on big pages like the full bbc news page. And that's with using their accelerator that works like opera mini and compresses pages and images - supposed to be like a 800kps line.
    I'm mostly using wi-fi for downloading apps and syncing things though.

    Another weird thing is that SMS messages seem to work between it and AU phones... i thought each carrier restricted SMS to their own network here?

    All in all, it seems like a great deal so far, as it costs 2000 a month less than my old au feature phone with wap/imode style 3g internet.

    ReplyDelete
  62. Thanks for sharing. I didn't realize they had an accelerator. I should change the URL of this site to bmobiledoentsuck.

    http://softbanksucks.blogspot.com/2011/06/japanese-carriers-finally-to-allow.html

    ReplyDelete
  63. Very useful information. Thanks for all your work. Do you have any information about b-mobile and windows phone 7 or 7.5. Any problem report with some windows phone?. I'm interested in a nokia lumia and b-mobile talking sim (voice and unlimited data). Thank you once again

    ReplyDelete
  64. Any idea whether Sony Xperia S with Gingerbread will work with the u300 micro-sim?

    ReplyDelete
  65. Great post!
    Although don't the platinum plans include unlimited data? Unless I'm reading this wrong, they seem to be tsukaihoudai:
    http://www.bmobile.ne.jp/sim_mp/charge_plan.html

    ReplyDelete
  66. Great post - I just signed up to their monthly talksim u300 and it all seems working. Only carrier I could get in Japan that would support my lovely Xperia Active handset. Next step - voicemail.

    ReplyDelete
  67. FYI Samsung Focus (Windows Phone 7.5) does not work with 1GB data-only sim.

    ReplyDelete
  68. HTC mytouch4g with cyanogenmod 7.1.0 glacier is working with the 1gb sim. I ordered it from Amazon.co.jp and has it shipped to a hotel. Manually added Apn and it doesn't show connected icon but works as described above.
    speedtest.net shows up/down at a few hundred k but it is enough for mail.

    ReplyDelete
  69. Thanks for the opportunity to post here for expert advice. I am reporting a mysterious mobile network problem on an HTC Incredible S.

    I bought the one month 1GB Flat Rate a few days ago, put in the APN and activated the SIM over the phone. Everything worked well as far as I could tell, including a crystal clear Skype call overseas. My PhoneUsage app indicates it was using about 10MB/day until this morning, when I found it wouldn't connect. I turned off "mobile network" with the intention of restarting it, but now that option is greyed out. Rebooting, including removing and replacing the SIM, does not help. Airplane mode is off. The "Network operators" setting indicates that NTT DOCOMO and SoftBank are available, but clicking on either one returns "Your SIM card does not allow a connection to this network." I assume that NTT DOCOMO is the network I want, (or perhaps bmobile runs on another NTT network that is actually down today?). I notice that while in the Settings menu for a few tens of seconds I am automatically taken to "Network operators", which indicates to me that the operating system is trying to get back online. I tried the "Select automatically" option on the "Available networks" setting, but it reports "Unable to connect to this network at this time. Please try again later."

    I did a quick search and found a site that suggested going into the "phone settings" using *#*#4636#*#* from the phone keypad, and turning off and then back on the radio. This changed nothing.

    I am using an unlocked but unrooted HTC Incredible S from Virgin Mobile Canada, Android 2.3.3, on the dm.jplat.net APN as bmobile@fr.

    ReplyDelete
  70. My guess is that it would be an issue with the phone, as SIM cards rarely break. Do you have another phone to try the SIM card with? That could rule out that it's the SIM card. When you got to settings -> about phone, do you see the 080 phone number associated with the SIM card?

    There were some outage issues with bmobile a few days ago, but I haven't heard anything recently.

    If nothing else, might be good to contact their customer service, which is very responsive.

    ReplyDelete
  71. Thanks for the reply. I do indeed get a phone number, so I think the SIM card is fine.

    I too believe it is a bug in the OS that somehow doesn't like data-only SIM cards. I tried throwing my SoftBank (voice and data) card back in, and after a short delay the "Mobile network" option became available again, but upon replacing the bmobile SIM "Mobile network" is again greyed out and unavailable.

    As for why it worked for four days and then decided to stop, my only explanation is that there was a short network outage that had I been patient would have resolved itself, but because I turned "Mobile network" off with the intention of restarting it, that changed something that the OS refuses to put right again.

    I found another post suggesting that I remove the battery for an extended period of time (>20min), but that also has not worked.

    I was at bmobile yesterday to talk to them about it, but so far they are just shrugging their shoulders and telling me to talk to HTC -- does anyone know how best to go about doing that? Any other suggestions most welcome.

    ReplyDelete
  72. Why dont you try doing a complete wipe of cache and user data after doing a full backup? If that doesnt work, you could also try rooting your phone, doing a S-OFF and then flashing a newer radio. You might find following threads useful,
    http://forum.xda-developers.com/showthread.php?t=1036581
    http://forum.xda-developers.com/showthread.php?t=1129014

    If you need this only for a short time and dont want to do radio stuff with your phone, you can always purchase a used Docomo Smartphone in the range of 5000 to 10000 yen for temporary use and try and sell it on your way out.

    ReplyDelete
  73. I am reporting that this same thing occurred today without my turning off the mobile network manually -- that is to say, for some unknown reason the phone shut off the mobile network itself, and as before I could not turn it back on normally. The same solution worked again -- insert a voice SIM and turn the mobile network back on, then replace the data-only SIM.

    This makes the problem worse than I thought, with the prospect of the phone disabling the network without provocation, perhaps when you don't have a voice SIM around to restart it.

    ReplyDelete
  74. There apparently seems to be a (rather complex) fix for the draining battery with data-only sim cards with Android phones:

    Haven't tried it though, just for your reference:

    http://www.japanmobiletech.com/2012/03/fix-for-excessive-cell-standby-battery.html

    ReplyDelete
  75. I just realized that article is from the exact same website...

    Hopefully still useful for others reading this

    ReplyDelete
  76. Does anyone know if the b-mobile U300 or 1GB Flat rate data sims will work without too many issues on an Acer Liquid Metal (S120 - Somtimes called an Acer Liquid MT??). This phone is running the latest Gingerbread 2.3.6.

    If anyone can confirm this works or not, it would be much appreciated. Thanks!

    ReplyDelete
  77. Hi SBS, me again thinking up complicated ways to save money, haha! I was re-reading this post specifically to see if someone had previously asked this question, as I am currently using the 1GB Flat Rate data-only SIM, but ready to switch to a voice plan.

    At first I was thinking of going with SoftBank, but the fact that I would be paying about $80 a month for essentially a data plan is frustrating to me. I'm thinking about going with bmobile again for voice and data, preferably using the talking platinum microSIM card, because of the "carrier speed" description for specific apps. If I'm using the same apps on an Android phone (I plan on buying the HTC One X), how does the SIM card know the difference? After all, it's just a SIM? I was also told this same information by a bmobile representative, that it would be the case where my data speeds would be slow, but I brushed it off at "We're not liable"-speak.

    If this is all true, it would really put a damper on my plan to go with bmobile, as it seems their non-iPhone SIMs all max out at 300kbps.

    ReplyDelete
  78. It's not the SIM, but the proxy (bmobile servers). My guess is that the it's based on packet headers. So if app X sends packets, and app X is permitted high speed data, those packets are sent through with little modification of speed. But if packets from app Y, which isn't allowed high speed comethough, they are slowed down.

    Get the 1GB flat rate talking SIM. It has no application specific throttles and works well.

    ReplyDelete
  79. Ah, I see, that makes sense. The 1GB Flat Rate talking SIM has no application specific throttles because, from what I can tell, everything already limited to only 300kbps, correct?

    The other reason I was looking towards to the platinum SIM is because I want to tether, since there's no damn free WiFi in this country, and the platinum will provide me with the opportunity to do that without killing my limit in a couple of days.

    ReplyDelete
  80. No, only the U300 is limited to 300. Flat rate is "carrier speed," which means that it is basically what docomo is capable of, minus the overhead of the proxy. The Fair has no proxy and is faster, but much more expensive.

    ReplyDelete
  81. Ah, I see. What was confusing me was on the chart, you list the talking SIM as having only 300kbps maximum speed. This leaves WiFi access for my Mac as the only thing keeping me from going through with the bmobile plan.

    So it comes down to: bmobile talking SIM 1GB plus a WiFi USB modem for Internet access on my Mac vs. SoftBank White Plan and Unlimited Data, but I can tether and not worry about a data limit.

    These seem to be my only two options, unless there is something I'm missing?

    ReplyDelete
  82. Hi, I am from Hong Kong,I am using HTC Desire,android 2.3.5, I purchased b-mobile visitor and planning to use it in japan.But I forgot and don't know how to check can I use my phone there with the b-mobile sim card. Can u tell me the answer?? Thankyou so much

    ReplyDelete
  83. You should be able to use it since HTC Desire supports 2100 MHz frequency.

    ReplyDelete
  84. Only potential problem would be if your phone is not unlocked. Your carrier should be able to tell you.

    ReplyDelete
  85. i'm moving back to japan as a student for 12 months in september, i have an unlocked HTC desire. i'm thinking about the b-mobile 'talking fair' SIM for ~3500 yen per month, but would it be a smarter investment to get a new LTE phone on a contract with docomo or AU?

    what price do smartphone plans start from these days, anyway? i don't need HEAPS of data, so not really keen to pay 5500yen/month for softbanks pakehoudai, etc.

    ReplyDelete
  86. If only 12 months, then bmobile is best. Reload the page because this post has been completely updated to reflect all the new products they offer.

    If you get it with AU it will be useless when you leave. If you get it with Docomo, it will only work on 3G when you leave, or maybe on GSM if you are going to the North America.

    Just made a post the other day on a new data plan from Docomo. But you'll pay a cancellation fee.

    Probably for you, the 1GB Flat rate talking SIM will be the best compromise between price and speed.

    ReplyDelete
  87. Has anyone here managed to get the b-mobile visitor SIM to work in an Samsung Galaxy S3 by chance?

    I have exactly the phenomena described above such as the "emergency calls only" thing and the 080xxxx number is listed in the menu - with the difference that the internet connection unfortunately doesn't work, no matter what I try. This really sucks since the same SIM-card works flawlessly in an iPhone 4S.

    ReplyDelete
  88. Just wanted to share my experience in case it proves useful for anyone. I have a Samsung Galaxy S2 HD LTE (SHV-E120L) from Korea.

    I picked up a 1GB flat rate (1GB定額) at BIC Camera yesterday (cost was about 3,475 yen) and did the easy phone registration. Within a few minutes the phone showed a signal but wouldn't show data. The pamphlet that came with the SIM only had APN instructions for iOS, so when I got home and checked online I saw there were a few additional settings for Android (namely authentication type and MNC). When I changed the MNC and saved, the APN information would disappear, and it still wouldn't connect.

    With a bit of searching, I found that one solution was to reset APN to default, then create a new APN with the bmobile settings (except the MNC), save and select that APN. Then edit the APN and change the MNC setting. The APN disappeared, but upon reboot the data connection works.

    Now, I wonder if I need to do that cell standby fix...

    PS: Great site, lots of useful info here. I have been... less than enamored with Japanese carriers over the years, it's good to know I'm not alone!

    ReplyDelete
  89. i need help please.

    i have an iphone 4 factory sim unlocked, I went into Softbank today as I am looking for data & voice plan, they said it is not possible, I am now living in Japan for a minimum of one year, I have my Gaijin card etc.

    Is Bmobile the best option? I was looking at the u300 plan

    all i want is data (mainly) but voice & texts as well.

    any advise would be greatly appreciated, tomorrow I am looking at going to the Apple store in Shinsaibashi or is that a wasted journey

    ReplyDelete
  90. 1GB Flat Rate - "more information" link points to japanmobiletech.com without the www but it doesn't work. The link needs the www

    ReplyDelete
  91. Excuse me, I am come from Taiwan and I will travel to Tokyo next month. I have a question that does b-mobile visitor support Samsung Galaxy S3 device?? Is that the same as Samsung Galaxy S2? Smart phone type?

    ReplyDelete
  92. Sony Ericsson Phones running 2.3.3 Gingerbread...
    This problem seems to be common in the world but it won't let you save APNs unless you disable the sim pin lock.
    (I don't think you can disable the sim pin lock with an unlocking code)


    Xperia X10 for NTT Docomo should work with a bmobile SIM if it's running the 1.6 or 2.1 it comes with. 2.3.3 was released for the X10 in other markets but not in Japan and only versions 1.6 and 2.1 are on the list.


    Anyone know how we can set the APN in any other ways? The phone should work on the network but it just can't set the new APN.


    It says "No SIM Card" though.


    Any ideas other than downgrading the device?

    ReplyDelete
  93. Derek, I had no problems running a 2.3 ROM on my NTT Docomo xperia. That phone is such a piece of shit that I haven't used it in forever. It had fully signal bars and no issues with a data-only Fair. Probably under the xperia label is a description of the ROM is was using. It was by a Japanese Dev from Kansai I think on XDA. Forget his handle...

    ReplyDelete
  94. Thanks. His ThGo2 ROM seems to be working well.

    ReplyDelete
  95. Hi!
    I'm currently with Softbank, but I want to get the Galaxy S3.
    I'm just not sure whether I should get the Docomo version or if I should purchase the international version and go with b-mobile.
    They haven't listed the Galaxy S3 as a device that would work with them. It also takes a micro SIM, not sure if that's a problem.
    And if I were to go with b-mobile, I still don't get which plan I should take as this is my first smartphone ever.
    I guess some kind of flatrate would be good.

    Any advice for me?

    ReplyDelete
  96. Dear SBSdroid,

    I have a few basic questions and I would really appreciate your help.

    If I'm gonna use b-mobile Talking 1GB Flat Rate service and call people here in Tokyo, wouldn't they be charged for incoming calls? Or if I call them using Skype?

    Also, do you know the price of messaging for this plan?

    And the last question: if I want to use this plan for more than 4 months, can I easily extend it?

    Sincerely,
    T.

    ReplyDelete
  97. late reply. That's it, I liked his stuff. battery life was world's better than with the DCM crap that came with the phone.

    ReplyDelete
  98. In what situation is anyone ever charged for incoming calls aside from "free dial" / toll-free numbers in Japan?
    I can't think of any.


    If you want a SIM card with a talk plan then I assume you live in Japan since residency is a requirement of all talk plans (aside from super expensive "rentals")
    so it'd probably be easiest to give b-mobile a phone call. These plans are intended to be used for a longer period of time but the terms of your contract for voice services should probably be worked out with a sales rep from bmobile.
    If you want English service, they have an English help desk Monday to Saturdays between 7am and 11am(?) or have staff at the same desk as willcom in yodobashi camera in akihabara at certain times of the day.


    check out bmobile's website bmobile.ne.jp


    If you call people using skype, you pay money for your skype-out in addition to the data being used however, you don't need to use a talk plan and can instead use the easier 1GB /30DAY flat rate data only sim and just keep topping it up as you need.

    ReplyDelete
  99. Thanks for the information, Nobuyuki-san!

    ReplyDelete
  100. This is all too confusing for me, a 60 year old non-tech type! Can someone advise me? 1. I'm in the US; 2. My wife is a Japanese national with an additional address, koseki, etc. in TKO (so no residency problems). ... 3. She has a Verizon iPhone 4s which we will unlock as soon as we get a micro sim with a foreign (non-US) country code. 4. ......... What is the best -- cheapest -- talking micro sim available? We can have her brother mail it to us in the US, so that's not a worry. I just don't want to end up buying the wrong type of sim.

    Please ... use a non-tech explanation!! (^__^)v

    Thanks,
    --GHP

    ReplyDelete
  101. I have bmobile 1gb talking fair but it is so slow - compared to white plan on softbank its 3 times slower

    Is 70kB psec during peak hours normal and 200kB off peak?

    Seems really slow to me

    ReplyDelete
  102. Great post, thanks!

    I'm thinking of getting the Talking 1GB Flat, I just have one question.

    I wanna use it with my iPhone, do you get a B-mobile-Emails address or something with the contract so that you can set up MMS (Emails) like with a SoftBank-Prepaid-SIM using an MMS-APN? Found no B-Mobile MMS-APN on the internet, only for cellular data, so I was wondering.

    ReplyDelete
  103. So useful! I wanted to keep using my European iPhone in Japan and was able to sign up for the Talking 1GB Flat rate thanks to your advice! I have a problem with SMS though, as very often my texts don't go through. Any idea why?

    ReplyDelete
  104. Great site! Just want to add my 2c in about my experience with b-mobile. I had 2 problems with the SIM card and my iPhone 4s.

    1) It wouldn't find the carrier automatically, no biggie, just turn off Automatic carrier selection and select JP DOCOMO (or NTT DOCOMO)

    2) There's no stored APN settings on the SIM card. This was the big problem, I didn't realise it was an APN error (there were no warnings given on iOS 5.1.1 aside from not being able to access the internet despite having reception) until my friend filed down his SIM card so his card fit in his iPhone 5 and it started throwing up PDP errors. The list of APN settings is here:



    http://www.bmobile.ne.jp/devices/setting.html


    Just in case anybody else is having connection errors with iOS devices. I'm not an Apple Fanboi. Honest...

    ReplyDelete
  105. On the topic of filing down SIM cards for iPhone 5, the b-mobile SIMs (at least the micro SIMS) have the useless C4 & C8 contacts which make the SIM card look way bigger than it should and may cause some users some worry when cutting them. It's ok to cut the bottom two contacts:

    http://www.airportal.de/nanosim/

    ReplyDelete
  106. Hi SBSDroid,

    Thanks a lot! This is probably the most informative blog about the Japanese mobile carrier scene.

    I'll just like to check with you if I have a phone that supports LTE but not the band 1 LTE network that DCM is using.

    As such, I'll probably only be able to use the 3G network even if I purchase the 3G/4G Chameleon SIM card.

    I'll just like to know if there's the possibility that by using the 3G/4G Chameleon SIM, I'll be able to access the 3.5G network (i.e. HSPA+) of DCM (if such a network even exists) which I wouldn't be able to access using the normal 3G bMobile SIM?


    Thanks a lot in advance!

    ReplyDelete
  107. There's a bunch of new SIM card options available now, including one that has both voice and data. I'd love to see an update to this article, as I'm unable to read the Japanese fine print on these new options to see if they are better options compared to the old plans. Thanks!

    ReplyDelete
  108. Hy,
    I'm Eleonora.
    I'm going to be in Japan for 6 month and I need a plan that allow me to talk an send SMS and/or mail (mail if it's possible outside Japan too).
    I'm not good in this kind of things so can anyone help me find a good rental sim?
    Where can I buy those type of sim card, for example in airport? I was thinking to buy U300 6 months micro sim..but I don't know anything about phones >-<
    Please, it's important
    Thanks for helping me :)
    Ele

    ReplyDelete
  109. Hi everyone! I am using a Galaxy Tab 7.0 3G with a b-mobile 3G smartphone sim, everything seems to be working fine except sms sending (I can place & receive calls, have data connections and receive sms). When I try to send an sms it fails instantly. I tried calling the service center and maybe asking for the Short Message Service Center (SMSC) number, since that is the only setting I thought it might be worth changing. Right now I have +81903101652 , tried also using 0903101652. The lady in the help desk had no idea about this number, said that she checked and from their side everything seems ok.

    Did you have this problem at any point? Could you verify that the SMSC number I have is correct? Thanks!

    ReplyDelete
  110. Hey guys,
    Just want to ask you about this sim card:
    http://www.bmobile.ne.jp/6m_gt/index.html
    Didn't find any information about this one here.  As I see it, it's prepaid for 6 months with the same price as u300 6 months. There is a 1gb limit for lte speed and after that speed is limited to 150 kps. Micro sims are also available.
    If this is right, this would be a pretty nice alternative.
    Can somebody please confirm this?

    I would like to use that sim card for my nexus 7

    Regards,
    Fabi

    ReplyDelete
  111. Sandeep KarmacharyaJuly 8, 2013 at 1:22 AM

    Will International Version Galaxy S 3 (GT-I9300) works with these Sim Cards?

    ReplyDelete
  112. Just to share my experience with the Huawei E5776 (http://bit.ly/11OboTg):
    I bought the b-mobile 4G 1GB 定額 card at Yodobashi Akiba. A friend of mine with a Japanese phone was nice enough to activate it for me. At first, I thought that it didn't work, though. The mifi was stuck in an endless loop of connecting and disconnecting from the network, no internet possible. What made it work is to set it to "3G only" under Settings/Dial-up/Network Settings/Preferred mode – which is a pitty because I originally bought the E5776 to be able to surf using 4G. But still, begin connected back to the world is nice.

    ReplyDelete
  113. I do an exchange for one year in Japan and brought my iPhone 5 with me. With the help of a friend I bought a bmobile Smartphone nano Sim スマホ電話SIM for LTE at Yodobashi Akiba (yeah only 3G useable). Everything worked out fine and was easy to set up. But since yesterday my connection speed is terribly slow. Line and iMessage work somewhat slow. The Facebook app, mail and Safari are practically unusable. bmobile advices to hard reset and take the sim card out and put it in again. But nothing helped so far. What else might I do?!

    ReplyDelete
  114. A question: according to wikipedia https://en.wikipedia.org/wiki/List_of_LTE_networks, since October 2013 there is the 1800 MHz LTE frequency listed for the NTT DOCOMO network. Does this change contradict the above statement that only Docomo/NTT phones can use the bmobile LTE service at 2100 MHz? Becaus1e I have a LTE phone that supports LTE 1800 (Samsung GT-I8730/Galaxy Express).

    ReplyDelete
  115. Hi,

    I've bought the 1GB Flat Rate SIM from Amazon, and I've activated it without trouble. But when trying to register the same credit card in mypage.bmobile.ne.jp I cannot do so, even if I had no problem when buying the SIM. I've also tried with another two credit (not debit) cards, but neither of them worked (maybe because they are from Spain).



    In the table it says that it can be paid with cash. Is there a way to it top-up with cash? If so, where can I do so? I've been searching everywhere, but I've not been able to find any information.

    ReplyDelete
  116. The 1GB SIM described here is not from Amazon and it's prepaid. I think you have a different product.

    ReplyDelete
  117. My bad, I explained it poorly. I bought the next SIM card (http://www.japanmobiletech.com/2011/09/b-mobile-1gb-flat-rate-sim.html) in Amazon.co.jp, but I think that this card is the one from B-mobile, not the one from Amazon, right?


    I paste here the link of the product (it is a long link, sorry for that):

    http://www.amazon.co.jp/%E6%97%A5%E6%9C%AC%E9%80%9A%E4%BF%A1-b%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB-%E6%9C%89%E5%8A%B9%E6%9C%9F%E9%96%9330%E6%97%A5-%E3%83%9E%E3%82%A4%E3%82%AF%E3%83%ADSIM%E3%83%91%E3%83%83%E3%82%B1%E3%83%BC%E3%82%B8-BM-FRML-1GBM/dp/B0098SXXAY/ref=sr_1_1?ie=UTF8&qid=1386072702&sr=8-1&keywords=b-mobile



    I also wrote B-mobile's helpdesk but they weren't really helpful. They told me that it probably is a problem with my card, and that I should try with another one (I tried with three different cards, including the one I used for buying it in Amazon that I use always in Japan, to no avail). But they didn't tell me if it is posible to top-up the card in a Konbini or in an ATM.


    Do you know if it is possible? In the table it says CC/Cash, but I have not been able to find more information.

    ReplyDelete
  118. Does anyone know if samsung s3 gt-i9300 will work with these sim cards?

    ReplyDelete
  119. Chandararith LieuJune 7, 2014 at 2:12 AM

    up till two weeks ago, i was using a s3 GT-9300 without problem so yes, it works

    ReplyDelete
  120. Yeah, in the end I ended up taking the risk and purchasing a SIM card. It worked great. So, I recommend it to anyone who's going to Japan... at least, if you have the same phone model as I do, it should work fine :)

    ReplyDelete