Free calls in WLAN and 3G application Tango Videos Calls :

Tango is a new application to make calls free videos worldwide from smartphones (iPhone 3G, 4 Android and mobile) via a WLAN or 3G.
You can automatically import your contacts who have installed the application and invite your friends to download it. Tango is very much like to FaceTime except that here we can go through the 3G and then stay connected while moving. The application is free and available on the AppStore and Android Market.
Basically it is happiness!...