Anonymous phone calling. Searching for anonymous calling apps in either the App Store or Google Play can see an abundance of different applications. Not Helpful 1 Helpful 8. This is necessary on cell phones even if you are making a local call or else the call is not guaranteed to go through as restricted. As a bonus, you can even port phone numbers over to Sideline, in case you don't want to let one go from another service. Learn how your comment data is processed. If successful, all they will see on their end once the call goes through is "unknown," "private," "restricted," "anonymous," or a similar indicator. Not Helpful 11 Helpful 7. Follow the same procedure if you wish to display it again. The Internet and mobile communications go hand-in-hand nowadays, and for the most part this can make everyday life much easier to manage. This will prompt a drop-down menu. Hot Latest.