Whatsapp Voice Calling Features Images Leaked

Now, Whatsapp working in voice calling feature. This new feature will help user to make free call all over the world. This feature now only constrution. 

Androidworld.nl released this voice calling feature construction screenshots. Here is the photo released by Androidworld.nl

This new feature make The Tech War between Whatsapp vs. Skype vs. Wechat vs. Viber