October 16, 2012, 1:08 PM — Here's how you can adjust your phone number privacy settings on Facebook.
1. Click your name in the upper right corner of the Facebook interface.
2. Click the About link.
3. Click the Mobile Phone option under Contact Info or just click the Edit button.
4. A menu will pop up.
5. Click the arrow drop down menu next to your Mobile Phone or Other Phones option.
6. You can choose from the following options:
7. Choose your preferred privacy option.
8. Click the Save button to save your changes.
For more, see the original article at the link below.
Make your phone number private on Facebook | Hindustan Times