|Softbank Mobile graphic depicting the dangers of phone unlocking|
Now, it seems that there may actually be problems. The Yomiuri is reporting that the Tokyo police have advised Softbank to suspend the program. The law requires that permission be obtained from the regulating prefectural office before beginning a program for selling used goods. Softbank hasn't done that but is running the program in all 47 prefectures.
Of course the "yarimashou" attitude of Son is admirable, but you really get the impression that he's just flying Softbank on a wing and a prayer. There's obviously a lack of advanced planning. Son hastily announces a tethering program that their Chief Technology Officer says their network cannot support, and then announces this buy-back offer. Had more time been taken, they would have realized the legal requirements and easily had complied by the launch of the iPhone 5.