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iPhone Update - Unknown error occurred (4000).

What do I do for this iPhone Update error?

The iPhone "iPhone" could not be updated. An unknown error occurred (4000).


I am on version14.0.1 updating to the bug fix release of 14.1

I have updated and restarted everything.

I am using iTunes 12.10.10.2

I am using a valid certified USB cable.


Windows, Windows 10

Posted on Oct 30, 2020 1:45 PM

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5 replies

iPhone Update - Unknown error occurred (4000).

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