Hi everyone..
I have similar problem and have attempted many times to fix it but failed.
I have just updated my iPhone 4S to iOS6 yesterday. It was iOS5.1.1 and was in jailbreak mode before the update.
I did sync my iphone and did the 'Backup' as well before the update by using my latest iTunes via my laptop.
The iOS6 update was successful.
However, the 'Restore from backup' failed.. many times!! Everytime I tried to Restore from backup, i lost internet connection towards the end of the 'restore in progress' process so it was never complete. I had to pull out the iphone cable or restart my pc every single time that happened. Because i cannot get an internet connection after that happened. I cannot connect to any wireless network, so I had to restart the pc!
(the iPhone says 'Restore complete' as soon as I pulled out the cable. But phone stays as NEW phone, none of my backup data was restored).
During the 'restore from backup' attempts (via iTunes 10.7 on laptop), I have tried:
- Restoring to factory settings first and then restore from backup = tried many times and still failed.
- Uninstalled Apple mobile device and iTunes and re-installed them = still failed.
- Switched OFF the phone and hold the Home button while connecting to the laptop. Restored to factory settings, then tried to restore from backup = still failed!!
- switching to different USB ports on my laptop including USB 2.0 and USB 3.0 = no luck, still failed.
NOTES:
-Laptop is on Windows 7 and have had NO such problems so far. I have been using iPhone since 3GS.
-Internet connection is via wireless router, steady connection.
-My 3GS was on jailbreak mode before. I bought iPhone 4S and successfully restored from my '3GS backup' without any problem.