Hi, I bought a used unlocked 3GS in the US. The screen went wrong and I brought it to Apple in France. They exchanged it for a brand new one and now I need an ATT sim card to activate it which I don't have... The baseband is 05.16.02 and version 4.3.5 Is there a way to Activate/JB/Unlock this phone ? I wanted to offer it for Christmas :-/ Thanks for your help !