I have an iPhone 3Gs that is on 4.3.3. ; I tried to use Jailbreakme 3.0 but it never finished installing cydia, it would always crash. I have previously used Jailbreakme 2.0 but decided to keep it stock last year. I restored to factory default and then my iphone would give me an error message that my sim card was not supported! How is that possible when I'm using my default AT&T card that was previously working before restoration? I went to the AT&T store and Apple and both were not able to help me. They tried switching out the sim cards and it still wouldn't work. I'm able to hactivate through redsn0w to bypass the emergency screen. As of now I only have wifi available. Tried using ultrasn0w but still no network. I do have Carrier as AT&T 10.0 and Modem Firmware 05.16.02 What can I do to get 3G back?