I am very confused and have never had anything like this happen before, after using PwnageTool to create my custom iPhone 3G firmware, putting it in DFU mode, and restoring thru iTunes (making sure the baseband wouldn’t be updated incase I needed to unlock in the future) I have 0 signal bars and the AT&T carrier name doesn’t show. This is very odd since I am a legit AT&T customer with the 2 year 3G contract and such. I’ve tried toggling the 3G switch, turning on and off roaming as well a