You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

📰 Apple introduces the 2025 Black Unity Collection

Inspired by the rhythm of humanity, a new Apple Watch Black Unity Sport Loop, watch face, and iPhone and iPad wallpapers honor Black History Month. Learn more >

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

Chant_T Author

Level 1

4 points

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

Top-ranking reply

Raicya

Level 10

209,313 points

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.

View in context

iOS Update error 4000

Similar questions