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My iphone 12 won't update, unknown error 4000

Posted on May 22, 2022 8:17 AM

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209,025 points

Posted on May 22, 2022 10:55 AM

See this Apple article: If you see an error when you update or restore your iPhone, iPad, or iPod

Connect your device to your computer using an Apple USB cable & try also another USB cable.

Turn your iPhone on and unlock it -> enter the passcode.

Go to Settings -> Display and Brightness -> Auto-Lock set to Never.

Guess you use a Windows PC, if so check the AV & Firewall you use on the PC.

Disable all AV & Firewalls temporarily while you restore & update your apple device.

Turn Off Hotspot.

Turn Off or remove VPN if necessary.

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