I just moved from the U.S to live in Israel for a while, and Orange is the official iPhone carrier in Israel. Does anyone know a way to make my AT&T 3GS iPhone work with an Orange sim? I don't want to unlock it using Jailbreak + ultrasn0w. I just thought since both AT&T and Orange are official iPhone carriers, that there would be a way to go from one to the other. Anyone have experience with anything similar?