You're out of luck, modulo extra keys and a recovery mechanism. Most services let you register multiple devices. I typically use a Yubikey nano and a regular

You're out of luck, modulo extra keys and a recovery mechanism. Most services let you register multiple devices. I typically use a Yubikey nano and a regular Yubikey. Then I have a backup on my keyring, but don't have to get it out every time. With WebAuthn becoming more popular, you can also use things like Windows Hello, Face ID, etc. Generally, I try to register all of those methods, and then if one device fails, I still have plenty of backups. But, some services don't let you register multiple devices (AWS comes to mind). In that case, you'll have to make sure you have a backup recovery method. (And those recovery methods obviously reduce the security of your account, SMS is notoriously weak.)