I got an email from Apple Support notifying me that the trusted number was changed. I didn’t do that on purpose. I’d probably done this by mistake while I was working on iOS update and setting up 2FA on my new phone. What can I do now?
I don’t know new trusted number (which isn’t even a real phone number, I don’t remember what I typed)
iPhone 8, iOS 12
See if you can log into your Apple ID account and change it back.
Note the last section for steps to recover the account if necessary.
Apple ID - Get a verification code and sign in with two-factor authentication
How to log into my account without verification code? How to change my trusted phone number if I can’t log into my account?
Did you read the last link that has some other ways of getting a verification code?
Account recovery without trusted phone number
