No matter how it works or tutorial , it's a free call!
To make a free call using an Internet phone, you might have to download free phone call software or use a soft phone from an Internet phone provider website.
You can use this app to learn how to call and talk free with others. usually calling to India , Srilanka , Pakistan from abroad is not that much cheap , this app will list the cheap or free provider to talk your friends from India , Srilanka and Pakistan. Wifi and 3G calling is completely free .Download and enjoy
Note - This app doesn't really allows you to call free around the world. but it has the list of free providers allowing people to call free using wifi or 3g. please read before download and dont give negative ratings