How do I use text messages (SMS) for two-factor authentication on Facebook?
Android App Help
iPad App Help
iPhone App Help
Mobile Browser Help
Facebook Lite App Help
If you're having trouble logging into your Facebook account, review these tips first.
When you turn on two-factor authentication, you're asked to choose either a security key, text message (SMS) codes or a third-party authentication app as your primary security method. If you choose to use text message (SMS), you'll be sent a text message (SMS) with a special 6-digit security code each time someone tries logging into your Facebook account from a mobile device or browser we don't recognize.
Note: Please make sure you are viewing your personal profile before starting the steps below.
To turn on text message (SMS) codes for your mobile device:
- Go to your Security and Login Settings.
- Scroll down to Use two-factor authentication and click Edit.
- Click Text message (SMS) when you're asked to select a security method and follow the on-screen instructions.
- Once you've turned on text message (SMS) codes, you should also set up a second security feature, such as a security key or recovery codes. This helps to protect you in case your mobile phone is lost, stolen or hacked.
Other Useful Resources
- Text message (SMS) security codes used for two-factor authentication are always 6 digits long.
- To set up text message (SMS) two-factor authentication, you can either use a mobile number that’s already been added to your account or add a new number. Learn more about how Facebook uses a mobile number added for two-factor authentication.
- If you're not receiving your text message (SMS) verification codes, you may have turned off text messages from Facebook. Learn how to turn text messages (SMS) back on.
- If you want to turn off text message (SMS) codes and use a different security method for two-factor authentication instead, you'll need to have have a third-party authentication app turned on or a security key added to your account to do this.
- You can disable text message (SMS) verification codes by clicking or tapping Turn off next to the mobile phone number you want to stop using. If you don't have a third-party authentication app turned on or a security key added to your account, turning off your mobile phone number will also turn off two-factor authentication.
- You can turn back on text message (SMS) codes for a mobile phone by clicking or tapping Use two-factor authentication, then Text message. Click or tap on the mobile phone number you want to start using again and follow the on-screen instructions.
- Learn more about managing two-factor authentication settings.
- Learn about what you can do if you turned on two-factor authentication but are now having trouble logging in.
Note: Facebook doesn't charge you for using text messages (SMS) for two-factor authentication. However, your mobile provider's standard rates for sending and receiving messages still apply.