error updating to ios 14
using windows 10 and latest version of iTunes on a new SE can't update to latest iOS. error 4000. tried everything nothing works
Windows, Windows 6
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Try the steps in this article:
iOS update and restore errors – Apple Support
and:
If you see error 9, 4005, 4013 or 4014 when you restore your iOS device – Apple Support
If still does not work you can try both a new cable and another computer.
If still fails its likely something wrong with the iPhone:
Contact Apple for support and service - Apple Support
Good luck!