The company also stated that the setup process has been improved and it will bring a simpler experience when 2FA is enabled.
A few months ago Facebook acknowledged a flaw in its 2FA system, resulting in a non-security SMS notification sent to the user's mobile phone. Facebook uses the number 362-65 as its two-factor authentication number, and the same number sends Facebook notifications to people via text messages without their consent. Responding to these messages is eventually posted to the user's Facebook profile.
In any case, Facebook believes that using authenticator applications is actually a more secure option than mobile phone numbers. Text messaging has been the center of many two-factor intrusions. To set up two-factor authentication on your Facebook profile, users first need to access the settings and then click "Security and Login." From there, find the "Using two-factor authentication" section and choose whether you want to use a mobile number or an authentication application.