How to Turn On Login Approvals on Facebook
The Login Approvals entry on Facebook adds another layer of protection to login notifications. Each time you (or someone else) logs into your account from a device that you haven’t used before, Facebook sends you a text message with a code that you have to use to complete your Facebook login.
For example, if you usually log into your Facebook account with your desktop computer but decide to log in with your laptop, Facebook texts you a code that you must type when prompted to access your account.
Obviously, to use this option, you need to be sure you have a cellphone number associated with your account. You can associate a cellphone number with your account via the Mobile tab on your Account Setting page or when you verify your account by using your phone.
To turn on login approvals:
Click the Edit link in the Login Approvals row.
Select the check box that appears.
The check box is labeled Require Me to Enter a Security Code Each Time an Unrecognized Computer or Device Tries to Access my Account.
The Set Up Login Approvals dialog box appears, with an explanation of how login approvals work.
Read the overview of login approvals, grab your cellphone, and then click Get Started.
Select the device you are using and then click Continue.
When the Security Codes box appears, click Continue.
Activate Code Generator as follows:
On your phone, open the Facebook app.
Tap the menu button.
Scroll down the screen and tap Code Generator.
You need to activate Code Generator so you can receive security codes on your phone.
Back at the Account Settings screen, click Continue.
Type the code in the text box and click Confirm.
If the code doesn’t work, you are given the option of having Facebook simply text you a code.
In the text box, type a name for the device you’re using (for example, home computer) and click Next.
The Success dialog box appears, with information about what to do if you get a new phone, lose your phone, or use Facebook apps.
Click the Close button to complete the process.
Now that login approvals are set up, every time you log in from a new device, Facebook texts a login code to your phone. You see this message.
Type the login code in the text box and click Submit Code to start using Facebook.