Facebook has this Feature of Phonebook which shows Phone Numbers of Friends on Facebook.

You can find contact numbers of your Facebook buddies by going to Account—>Edit Friends—>Phonebook.

So, you can take this these contact numbers and make calls to them if you don’t have it in your Mobile Phone’s phonebook.

Don’t want to show your phone number?

If you got amazed by this and are concerned about your Privacy then here is a thing you can do.

There are two ways Facebook gets these numbers, One, when a person himself puts the phone number in his/her profile. Two, when someone import contacts from phone.

Delete Your Phone Numbers from Your Profile

Click here (if you are logged in) or manually go to Edit Profile—>Contact Information and remove your Phone Number if you have added there.

Prevent Facebook from Importing Your Phone Contacts

Click Here or copy this address in address bar of your browser:

 http://www.facebook.com/contact_importer/remove_uploads.php?r=/phonebook