So I am looking to get an iPhone 3G, but I will be moving to England at the end of the year, so will need it to work there on O2 as well. Talking to AT&T and Apple reps they seem to be suggesting that it wont work, and it wont get unlocked and hardware problems and stuff, but it seems like they may just be yanking me around cause they don't really know or just want me to buy two. Would anyone know about switching an American iPhone from AT&T to O2? Has anyone done this on the original iPhone? I assume the technical hardware would definitely work on both networks, but am not sure. Does anyone know for sure that the hardware would work on both networks? I also assume I would have to unlock the phone myself (even though I am moving from one apple approved carrier to another apple approved carrier ) but does anyone know for sure? THANKS!