Overview
The Microsoft Authenticator smartphone app is the preferred method for MFA and SSPR. However, it is possible to use mobile or landline phone numbers as well as alternate email addresses as backup methods.
This video will discuss the process to add these methods to your MFA profile.
Beyond the video will give you a link to adding an Authenticator App for verification, as well as instructions for other verification methods.
Adding an Authenticator App
Go here for instructions on adding an Authenticator App to your Security methods.
Additional Authentication/Verification Methods
You can add, delete or change your authentication/verification methods.
See Article for Text Message, Phone Calls, Email