Apple Intelligence is now available on iPhone, iPad, and Mac!

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

iOS Update error 4000

Not able to update my iPhone Pro Max into iOS 15.4.1. An unknown error occurred 4000. Any idea??

Posted on Apr 22, 2022 6:35 AM

Reply
Question marked as Top-ranking reply

Posted on Apr 22, 2022 10:02 AM

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

If you see an error when you update or restore your iPhone, iPad, or iPod - Apple Support (SG)

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.

If they are On, turn Off Hotspot & VPN. 

1 reply
Question marked as Top-ranking reply

Apr 22, 2022 10:02 AM in response to Chant_T

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

If you see an error when you update or restore your iPhone, iPad, or iPod - Apple Support (SG)

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.

If they are On, turn Off Hotspot & VPN. 

iOS Update error 4000

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.