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Level 1

5 points

unknown error 4000?

While updating my iPhone 8 I got an error. Unable to update iphone. Error 4000

Posted on Apr 30, 2021 3:50 PM

Top-ranking reply

Level 10

91,311 points

Posted on Apr 30, 2021 3:54 PM

Error 4000 is not on the error list and is a bug in some versions of itunes for Windows

If it still happend after updating iTunes to the latest version

Either

(1) Use Wifi instead, Settings, General, Software updates

(2) Use itunes but temporarily disable passcode on the phone. That will clean out any cards you have in Wallet

(3) borrow a Mac

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