Tried updating my jailbroken iphone
Some users are experiencing trouble installing the i OS 10 software update by way of the Over-the-Air Software Update mechanism.
The problem is not subtle if encountered, the update halts and then displays a “Connect to i Tunes” screen similar to recovery mode, preventing the update from going further.
Some users who restore the effected i Phone or i Pad through i Tunes discover the device is being downgraded to i OS 9.3.5, rather than updating to i OS 10.
If this happens, it may be a good idea to stay on i OS 9.3.5 for a while until the trouble with the i OS 10 update is resolved, or use i Tunes to install the i OS 10 update instead of the on-device OTA mechanism.
Once the restore process has completed your i Phone will restart and the Apple logo will appear while booting up.
The 1671 error may be resolved simply by waiting until the Apple servers can be contacted successfully again.
There are also mixed reports of resolving i Tunes error 1671 by restarting the i Phone or i Pad and the Mac or PC.
After the restore is complete and your i Phone restarts you will see the "Connect to Activate" screen.
You must continue to keep your i Phone connected to complete activation.
If your device is still stuck on the i Tunes logo screen, proceed with the restore or update process with i Tunes as recommended.