Had a real old ipod I just traded to a friend for his old iPhone 3g. He had gotten a new one. I currently have T-Mobile and would like to try and use the Iphone. There is a ton of information and it ends up being confusing on what I need to do. Do I jailbreak and then unlock? Or can I just unlock? It has software version 4.1 on it. Can I go backwards on the software? Can someone explain in some easy steps what to do?