OK, ive got a Q for you. If one had an iPhone that they unlocked on their mac, then gave said iPhone to a PC using friend, when that PC user plugs it into the computer, im guessing iTunes will warn the user that it needs to restore it to 1.1.4 on windows and link it to their iTunes library? Since ive never unlocked an iPhone before, would this PC restore brick / undo the unlock that was on it? or would it restore it fine? Im not worried about the jailbreak, just the SIM unlock. sorry if this is a simple question that has been answered before, its a difficult one to search.