Finally WhatsApp has launched the Voice calling feature, atleast in India. This feature is only available with the latest version of the app, i.e. v2.11.508. But, the latest version we have in our smartphones or even on Google Play is v211.505. So, to enjoy the free Voice-Calling feature on your phone, you can download the latest version 2.11.561 from this page. It is an APK file, simply download and install it on your phone, like all other apk files. You can know more (features and limitations) about this new WhatsApp Voice Calling feature in this post.