iphone 6 ristor

Please specify the issue. Here you may find useful info how to Restore your device:

Restore your device from an iCloud or iTunes backup - Apple Support

Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support

Resolve iOS update and restore errors in iTunes - Apple Support

Get help with iOS update and restore errors - Apple Support

From Get help with iOS update and restore errors - Apple Support

Check your security software

Errors: 2, 4, 6, 9, 1611, 9006.

Sometimes security software can stop your device from communicating with either the Apple update server or with your device.

Check your security software and settings to make sure that they aren't blocking a connection to the Apple servers.

If you still see the error message, check for USB connection issues.