Hi, I'm new to this forum. I know this question has been asked before. I am studying in Uk and I bought a Iphone 3GS there at a very high price(no long term contract) couple of months ago. Because of personal reason, I am moving back to US next week, I really like the Iphone and I want to continue to use the Iphone in US with the one that I have if that's possible, if its not then what? I don't want to jailbreak the phone because I want to update my Iphone with Apple's firmware.