If you want to call anyone to mobile or landline, you will be charged as per Skype rates.
Whats App is one of the most popular instant messaging software for Android devices.
It’s available for Black Berry, Android, i Phone, Windows Phone & Nokia Phones too.
It comes up with cool avatar settings and built-in emotions to make your e Buddy experience much better.
Viber Chat lets you connect with friends using text messages or calls using your Android device.
It supports automatic synchronization of contact book with Whats App.