Callboxx allows mobile subscribers to be able to reach other mobile subscribers and business numbers for free. It only allows the users to only call.
High quality voice call

Your calls work across mobile devices using your phone’s Internet service, even on slow connections.

*Data charges may apply. Contact your provider for details.

If your network speed is too slow or you don't have enough device storage, Callboxx may not install properly.

If this happens, please check your connection, and try again.