I want to add a mobile number to my Facebook account

 

To add a new mobile phone number to your account or switch numbers:

1. Click on the downward pointing arrow at the top right corner of the screen
2. Click Settings
3. Click Mobile
4. Click Add another mobile phone number to activate a new number
5. Enter your mobile phone number and click Continue

If you want to remove a mobile phone number, you can click Remove from your account next to any number you'd like to remove.