Hey, I have AT&T and wanted to Jailbreak my iPhone. I had 3.1 on there and I followed some tutorials online on downgrading. I grabbed 3.0 and went into itunes, down graded. Then I used Redsn0w to jailbreak 3.0. It went fine, but now it's stuck in an endless cycle of iTunes connect. (I'm at work so I can't connect it to my normal iTunes.) But I DO have my iTunes synced here too. I went and got iRecovery and did "setenv auto-boot true". Then it loaded up fine, but I don't have a carrier now. I don't think I need ultrasn0w because I am not switching to T-Mobile or another carrier. Any advice on how to get my carrier to work?