Two-factor authentication is a security feature that helps protect your Facebook account in addition to your password. If you set up two-factor authentication, you'll be asked to enter a special login code or confirm your login attempt each time someone tries accessing Facebook from a computer or mobile device Facebook doesn't recognize. You can also get alerts when someone tries logging in from a computer Facebook doesn't recognize.
To turn on or manage two-factor authentication:
Go to your Security and Login Settings by clicking in the top-right corner of Facebook...
Next, click on Settings
Then look for Security and login on the left navigation panel and click on it.
Scroll down to Use two-factor authentication and click Edit.
Choose the authentication method you want to add and follow the on-screen instructions.
Click Enable once you've selected and turned on an authentication method.
There are several two-factor authentication methods you can use with your Facebook account when logging in from an unrecognized computer or mobile device. To get started with two-factor authentication, choose either:
- Text message (SMS) codes from your mobile phone.
- Login codes from a third party authentication app.
You'll need to have at least one of these set up in order to use two-factor authentication. Once you have added either text message (SMS) codes or a third party authentication app on your account, you'll also be able to set up some of the optional methods below:
- Approving your login attempt from a device Facebook recognizes.
- Using one of your recovery codes.
Tapping your security key on a compatible device.