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Can't update iPhone 8 to iOS 14

When trying using iTunes - after downloading - it gives an error 4000.

When trying using the iPhone itself there's no error - it just says it can't update.


Phone has 40 GB free - computer has 2 TB free.


Phone was recently restored to factory configuration.

iTunes was recently updated.


Any ideas?


Posted on Sep 16, 2020 5:44 PM

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Posted on Sep 18, 2020 2:42 PM

Cable change didn't work - also was not able to update over the air either. I opened a ticket with Apple support. They suggested doing a DFU mode restore - and it worked. It just took a really long time after the phone came back up because it was doing a file system recovery operation.


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Can't update iPhone 8 to iOS 14

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