"Apple ID is invalid or not supported" when trying to restore it
Hello.
my friend lost his phone and he can't remember his Apple ID. We want to restore using phone numbers, but it doesn’t work, it says Apple ID is invalid or not supported. He remembers all other data including the password, etc. Please help us find a phone and open access to Apple id.
Thank you.
[Re-Titled by Moderator]
iPhone 14 Pro, iOS 17