Guys I need a little help. I jailbroke my phone and everything was going great. I installed SBSettings and 3G Unrestrictor. I then tried to test a 3g FaceTime call and it failed. Then I received a "No Service" status. I tried rebooting, airplane on/off, reset network settings and finally Backup and Restore. iTunes downloaded the software to restore and I received an error, I think it was Error 21, and when I click on the link there is no information available. I have a Sprint iPhone 4s. Please help. Thanks.