How to activate Two-Issue Authentication
1) First of all log in to your Facebook account.
2) Click on the triangle visible on the top right side and go to Settings.
3) After going to Settings, you will see the option of Security and Log-in on the left side.
4) After clicking on Security and Log-in, you will get change password and log-in options at the bottom. Just below these options is ‘Two-factor authentication’.
5) Click on Two-Factor Authentication.
6) After this you have to click on Get Started.
7) Now you will have two options – Text Message and Authentication App.
First method: Textual content message
1) If you select the text message option, you will have to enter the phone number. Keep in mind that a code will be sent to your number for verification.
2) After entering the number you will receive a code on your phone.
3) Two-factor authentication will be activated as soon as the code is entered.
Second method Authentication App
1) If you do not want to enter your mobile number then you can select this option. For this you will have to download the Google Authenticator app visible on the screen.
2) After downloading the app, scan the QR code visible on the screen with the help of the authentication app.
3) After this enter the code visible in the app on the computer.
4) After entering the code, you will see that two-factor authentication will turn on.