unknown error 4000
Ian's i-phone could not be updated. An unknown error occurred (4000).
Help, don't know what to do!
iPhone 8 Plus
Question marked as
User profile for user:
Brian_P7
User level:
Community Specialist
Hi reedy1,
Thank you for using the Apple Support Communities. We understand that your iPhone could not be updated because of an unknown error (4000) and we'd be happy to help you with this! When you start the update make sure that the iPhone screen is unlocked. If your iPhone screen is unlocked and you still have problems updating follow the steps in the Apple Support articles If you see an error when you update or restore your iPhone, iPad, or iPod and iOS update and restore errors You can also try to update your iPhone wirelessly see the Apple Support article Update your iPhone, iPad, or iPod touch.
We hope this helps.
Take care.