Okay so I recently tried to jailbreak my friends iPhone 4S on the latest ios 7 with the new evasi0n 7 jailbreak. The jailbreak proceeded with no errors but when It went to reboot for the final time it got stuck in the apple logo loop, this happened because he updated his ios 7 over wifi instead of on iTunes. So I put it into DFU mode and restored it from iTunes and then it finally turned on so he booted up an old backup of his phone he had so he would get his contacts again and he got that message on his phone and his 3G doesn't work anymore so he contacted his carrier and they tried a bunch of stuff and they couldn't get it to work... How do I fix this???