Apple ID verification failed... An unknown error occurred. So the big question is how to fix an unknown error?
unreliable apple id
iPad Air 2, iPadOS 13
unreliable apple id
iPad Air 2, iPadOS 13
If your are connected over wi-fi, try to switch to cellular.
If your are connected over cellular, try to switch to wi-fi.
If your are connected over wi-fi, try to switch to cellular.
If your are connected over cellular, try to switch to wi-fi.
See if anything here helps.
https://appletoolbox.com/error-connecting-apple-id-verification-failed-how-to-fix/
https://macreports.com/verification-failed-there-was-an-error-connecting-to-the-apple-id-server-fix/
https://appuals.com/fix-verification-failed-there-was-an-error-connecting-to-apple-id-server/
https://errorcodespro.com/there-was-an-error-connecting-to-the-apple-id-server/
Some other things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.
Try a restart.
Restart your iPhone, iPad, or iPod touch
Try a forced restart.
If necessary
Do a backup and try a factory reset. Then restore from your backup.
Backup - Restore your device from an iCloud or iTunes backup.
Apple ID verification failed... An unknown error occurred. So the big question is how to fix an unknown error?