2 of my co-workers with Sprint 8830's confirmed they were able to make phone calls in CDMA roaming mode last week from Tokyo.
The service seems limited to immediate Tokyo limits. The phone picked up signal and worked near Narita Airport, JR Tokyo Station and JR Shinagawa station. They were unable to get a signal in Kawasaki.
They claim to have received text message from Sprint with local access dialing code when they turned their phones on after landing at NRT.
Anyone know what the roll-out plan is to allow CDMA roaming in broader area of Japan?