Hello, I have a 3g iphone with a 6.15.00 baseband and a 4.2.1 ispw. I unlocked it with redsn0w 0.9.6b6 and ultrasn0w and after that, it doesn't ever get service. It's always displaying the no service sign, and I've even tryed with the original carrier sim card wih no success. I've also tryed to reset all settings, again with no success. I've tried in two different pcs, one running windows 7 and one in xp. I don't have a mac and my dog ate the original sim card, wich is from portugal, and now i'm living in Brazil. Please, pleaaaaase help me. Tks a lot.