How do I turn on 2-Step Verification?

To turn on 2-Step Verification on the web:

1. Go to your Profile page
2. Scroll down to Login & Security
3. Select "Turn On" under 2-Step Verification
4. Go through 3 steps to re-authenticate with your password, add a mobile phone number, and enter the code to verify the number

To turn on 2-Step Verification on the mobile apps:

1. Go to the More menu
2. Select "Settings"
3. Select "Password & Security"
4. Switch on 2-Step Verification under "Additional Security"
5. Go through 3 steps to re-authenticate with your password, add a mobile phone number, and enter the code to verify the number

Note: When you turn on 2-Step Verification on the web, you will be signed out of the mobile apps.