Our company president uses a Blackberry Pearl. He travels internationally fairly often. He was in Tokyo for the first time since receiving the Pearl, and he said he could not make/receive calls.
After doing some research and speaking to AT&T and RIM, it seems the issue is that the Pearl uses the 1900Mhz frequency, but the primary carrier in Japan runs a 2100Mhz network.
The situation leaves me with many questions, but I guess have only one concern: what's the best option I have the next time this user travels to Japan?
There must be countless numbers of Blackberry users who travel to Japan on business. I'm wondering how they overcome this issue.