My friend gave me a 3GS so that I can update it for her. She was on iOS 3.? and it was jailbroken and unlocked to work on the carrier here in my country. While updating, I first ran into a problem and had to restore to factory settings. So I did that. Now the iPhone is restored to 6.1 but it is now locked and unactivated. When i turn it on i get the "iPhone grey background screeen/setup" and on iTunes it says "The SIM card inserted in this iPhone does not appear to be supported." Is there a way to activate the 3GS so I can unlock it to use on my carrier? I dont have any ATT sims around me. I've heard Redsn0w can help but its difficult to find any detailed instructions. Any help would help because she's getting pissed and wants her phone back ASAP.