With Dingtone free calling app, not only are app-to-app calls free, but you will also be able to call anyone in the world for free, even he/she does not have the app.
Calls among 30 million Dingtone users are totally free. As long as you and your friend both have Dingtone, you can call and text him for free even you are continent apart. There is no roaming fees or hidden charges. Invite your family and friends to join Dingtone, then you can enter the world of really free talking and texting.