having trouble updating my iphone through itunes
trying to install my update with IOS on itunes. getting an error code 4000
iPhone 11, iOS 15
Question marked as
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)
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.