| Recommended Configuration | SMS | 
|---|---|
| Alternate Configuration 1 | SMS; Authenticator | 
| Alternate Configuration 2 | Authenticator | 
| Alternate Configuration 3 | SMS; U2F | 
| Account/Password Recovery | PR SMS only if 2FA is not enabled; PR email | 
| Remarks | backup signup available; Optional feature called PR Protect - requires email address to be correctly entered, does not help against PR SMS |