So my friend bought a iPhone 4 that is supposed to be "Unlocked" from O2, but apparently it's still currently locked. On the O2 website, it says to unlock it he would have to buy a Prepaid SIM and then pay the 15 pound fee to unlock it. The problem is, we are in the US... So it's a little difficult to just walk in and buy said SIM. Does anyone have any ideas? Anything else work for people? If someone from the UK mails a SIM to us, would that work? He's kind of scrambling since he's out a lot of money at the moment.