after update to 15.3.1 the error "Contents of iPhone could not be read. Click Restore...

Hi alexzh16,

Thanks for using Apple Support Communities! We see you're getting an error message when connecting your iPhone to your Mac, and we'd like to help.

Are you trying to back up your iPhone to your Mac? If so, you can use iCloud to make that backup instead:

How to back up your iPhone, iPad, and iPod touch with iCloud

Here's an article for help with not being able to use iTunes or Finder with your iPhone:

If you can't back up your iOS or iPadOS device to a computer or restore it from a backup

For additional help with that message, contact Apple Support:

Get Support

Take care!

Hey alexzh16,

Thanks for the reply and additional info.

We'd suggest contacting Apple Support to let them know about the error message you're receiving.

Get Support

Cheers!