Here is how it works: You need a Wi-Fi device because the call will be carried over the internet, not throught the carriers’s pipes. Once the application is loaded and started, the software typically displays its own keypad. As long as you are in a Wi-Fi hot spot, you can make free calls directly to other memembers of the particular service, for example Skype-toSkype. Or you can call landlines through skype at cheap rates once you have a prepaid account.
Skype and Fring users are assigned ID numbers or names and used for dialing, the calls go over the service’s Interent server though it may be partly routed over phone lines.