Enabling two-factor authentication on Facebook, also known as two-step verification, is a way to enhance account security by requiring users to provide a second form of authentication in addition to their password, usually through a text message, a verification app or a security key. Here are the general steps to enable two-factor authentication on Facebook:
1.Log in to your Facebook account: Log in to your Facebook account with your username and password.
2.Go to Security Settings: Click on the drop-down menu in the top right corner, select "Settings & Privacy" in the menu, and then select the "Settings" option.
3.Go to Security & Login: Select "Security & Login" in the left navigation bar.
4.Enable two-step verification: Find the "Two-Factor Authentication" section and click the "Edit" button.
5.Choose a verification method: Choose your preferred verification method, such as an SMS verification code, an authentication app (such as Google Authenticator or Authy), a security key, and more.
6.Follow the prompts to set up a verification method: If you selected SMS verification code, you'll need to enter your mobile phone number and receive a verification code. If you choose an authentication app, you'll need to scan *** or enter the key manually. If you choose a security key, you'll get a backup key to sign in if you can't use another verification method.
7.Complete setup: Follow the prompts to complete the setup, depending on the verification method you choose.
When it comes to getting multiple backup two-factor verification codes, Facebook will usually only provide one backup code as an extra layer of security. If you need more than one backup code, you can try one of the following:
1.Contact Facebook support: If you have special needs or questions, you can try contacting Facebook support and asking if they can provide additional backup codes.
2.Use other methods of two-factor authentication: You can try other methods of two-factor authentication, such as authentication apps or security keys, which usually don't limit the number of backup codes.
In any case, please keep your backup codes safe and do not give them away to others to keep your account safe.