I've been researching this for a while, but keep getting conflicting answers so I thought I'd post a thread. Situation: I want an iPhone4, and am moving to Japan next week. Option 1) I am eligible for an AT&T upgrade, so I could pre-order an iPhone4 this week. Everything would work in Japan except the actual cell phone and GPS (even if I hack it), and when I'm back home in the US on leave the phone would work. Option 2) I could get an iPhone4 via SoftBank when I get to Japan. This way It would work as a cell phone while in Japan, but not when I"m home on leave (even if hacked). Also ... I'm not sure everything else will work on the phone! Some people have said that the GPS doesn't work in Japan, others that the WiFi doesn't work in Japan, etc. etc. I need to be able to use Skype on my iPhone4. Does anyone know for sure what (if anything) is "turned off" on the iPhone4 in Japan? Thanks gang.