Hi. I'm trying to unlock an iPhone 3GS baseband 05.12.01 with the latest version of ultrasn0w. We just jailbroke it with star and now we are trying to unlock it. The first time I ran it, it got stuck and did not respond, so i rebooted the device, went into cydia, and checked if it was "installed" and it was. I then tried to put in a T-Mobile SIM card and it did not work Please Register or Log in to view images. It gave the no sim installed error. Can somebody please tell me what to do. BTW, its on iOS 3.1.3. THANKS IN ADVANCE!!!!