Originally Posted by Dubdub
The only BB that I know of that will work is the 8707v. But it is only GPRS capable here in the US. I assume the 8707h is a similar device.
Japan uses WCDMA2100, although Softbank has a couple GSM devices but again, they do not support the US GSM frequencies.
Softbank doesn't use GSM. No one does in Japan. Softbank uses UMTS2100 like NTT, but they both sell phones with GSM bands in them for global roaming. Hence the reason people like to spend $800 to get a Sharp 904SH here.
The 8707h is the device that NTT DoCoMo sells. Any variation of 8707 will function there.