Thanks for that apps info -very useful!
Couple of rather naive questions (sorry in advance!) :-
Will my UK iPhone receive/send calls and texts while in Japan ?
Will it connect to the internet via 3G ? (I'm assuming I'll have no issue connecting to a wifi connection subject to having access to any network).
Will the GPS work ? (I understand that most GPS-based apps use the internet for maps and information)
I'm off to Japan (for the first time) in late march / early april, and knowing how useful my phone will be is helpful!