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Level 1

4 points

itunes says my phone could not be updated. error code 400

itunes says my phone could not be updated. error code 400. what is the problem / fix?

Windows, Windows 6

Posted on Feb 1, 2021 7:40 AM

Top-ranking reply

Level 10

274,430 points

Posted on Feb 1, 2021 9:53 AM

See If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support. If you're trying to update over the air try using iTunes instead, or vice versa.

If the code is -4000 then disable Find My IPhone before updating with iTunes for Windows then enable it again afterwards, or update over the air.

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