While connected to iTunes on my PC the Software downloads, extracts, backs up then issues msg:
The iPhone "Tom's iPhone" could not be updated. An unknown error occurred (4000).
Seems odd that an Apple product would throw an 'unknown error'.
iPhone 8, iOS 13
If you're getting that error while updating your device via iTunes on a computer, try this workaround:
When finished, re-enable your passcode on your iPhone.
Regards
Giulio
If you're getting that error while updating your device via iTunes on a computer, try this workaround:
When finished, re-enable your passcode on your iPhone.
Regards
Giulio
Well I didn't disable the Password. I did make sure the device stayed awake.
I then received the following msgs:
Preparing iPhone for software update.
Verifying update with Apple.
Verifying updated software.
Waiting on iPhone
Updating iPhone software
Update successful!
My guess would be a step was missed in the update routine(s) to prompt for password if the device went back into 'standby' mode and my keeping it awake till the update started processing negated the need for the password.
That happened to me too, updating my device to iOS 14 and to 14.0.1 (1st time in 12 years that I use iTunes to update my iPhones, and I never needed to disable my passcode before, the procedure was automatically asking for it). Your guess is my guess.
But... glad that my workaround worked for you too. Let's see what happens next time.
Take care.
Giulio
Thanks a lot. At least Apple should provide this officially, you saved my time. I thought I had less space in OS, was about to uninstall steam, thanks a lot.
My pleasure.
Today a new version of iTunes (12.10.10) has been released. Perhaps that fixes the issue.
Regards
Giulio
My iPhone 8 fails to update to iOS 14
