Azure / Microsoft Multi-Factor Authentication reset
tl;dr
Always set up more than one method for Multi Factor Authentication whenever possible. It will help you out, no matter the platform.
Based on my answer @ Stackoverflow:
Last month I needed to reset my phone because it was stuck in a boot-loop. So, I could write a blogpost about what kind of phone it was and why it showed this behavior. But instead, I like to address another kind of hassle that followed: Resetting my MFA in Azure tenants i was a guest in.
The only way out of the boot-loop was a hard factory reset of my phone. And this meant losing the authenticator app and all its MFA accounts.