I'm about to go to Japan for a business trip. Exciting! A small question, I learn that I can't use my own cell phone in Japan, because different network technique? Did anyone have the same problems? How do you solve it? I find a Japan cell phone rental service from google, seems not bad. It's cheap, easy,and the most important, the phone can be delivered to my home in Michigan before leaving. I'd like everything arranged well before my travel,it's necessary. Anyone who used such service? any suggestions?