Facebook Shows Why SMS Isn't Ideal for Two-Factor Authentication

Facebook is sending its two-factor authentication users text messages they don’t want. This situation provides yet another reason why you should use a dedicated app for generating two-factor authentication codes instead of SMS.

How to enable two-factor authentication (2FA) on every social platform

What Is Two-Factor Authentication, and How Does It Work?

What is two factor authentication and why should you use it?

How to set up two-factor authentication for your Facebook account

Facebook 2FA is stuck in a loop and I have tried everything I can to get back into my account : r/facebook

How to Resolve Facebook Two-Factor Authentication not Working?, by Eva Jones, Technology Hits

Facebook admits its spam texts to two-factor authentication phone numbers were caused by a bug

Types of two-factor authentication, pros and cons: SMS, authenticator apps, YubiKey

SMS Two-Factor Authentication (And Why You Shouldn't Use It)