Welcome to the Apple Support Communities!
I understand the telephone number associated with your Apple ID has changed and you are trying to update your two-step verification authentication. The resource below explains how to sign in to your Apple ID account page to make the changes to the telephone number. Then, depending on what iOS version you have, you may have the option to switch to two-factor authentication.
Switch from two-step verification to two-factor authentication
While you are editing your Apple ID account info, you may also want to update the rescue email address or other important contact information as well.
About your Apple ID email addresses
Enjoy your day!
anyone happen to know how do i change my number on 2 step verification because the number no longer exists and in order to add a new number, it keeps sending a verfication code on my previos registered number.
1 reply
Good afternoon idrees88,
2 Step Verification number change