Whatsapp messenger has now integrated free voice calling feature, that allows users to call other
Whatsapp user using the app.
If you are using an Android device, you would need to be running Android 4.4 kitkat to use this feature.
Blackberry OS10 would also get this feature.
To get the new Voice call feature all you have to do is update your Whatsapp messenger
If you are an Android user, you can download / update your whatsapp messenger hereShare with your friends