[aaaaaaaaata]

Why?

You'd never register a token with an actually secure 2FA schema (account inaccessible if token inaccessible) with just one device.

Back up your 2FA/MFA.

[josefresco]

I print backup codes where available, but some providers don't offer it and instead instruct me to have two devices. Do you maintain 2+ devices with your 2FA codes? Do you carry both devices everywhere? Or just when you need to add a new 2FA code to Authenticator?