Hi Macrumours, I did some searching but to no avail. Hoping to get some expert advice. I tried jailbreaking my factory unlocked iPhone 4 this evening, successfully upgraded to 4.3 (on a mac), then booted into Windows 7 (bootcamp) to perform the jailbreak with sn0wbreeze. All is well, completed the jailbreak but here is the problem. I've lost all information on the phone, thinking I can sync it back to the phone on my mac side, but it would freeze and couldn't complete the sync. My phone is as well unable to detect my mobile network, and stuck at 1 bar signal. 1, I tried booting into DFU mode, tried doing update and restore, it returned a message later, says "couldn't restore iPhone, internal error occurred." What could be causing the internal error? No error codes were provided. 2, Is there anyway I can reset the phone back to iOS 4.3 unjailbroken state? **********edit********** for those of you who are running into the same problem, I did the following to reinstall iOS 4.3. use another mac computer open iSync preference and reset history go to account, create new account with admin rights restart mac, log into new account open itunes, restore -> restore update go back to main computer i back up my iphone with restore to previous back up done. Thanks guys.