How to Activate WhatsApp Video Calling Feature on Android

Read this post and learn how you can activate WhatsApp video calling feature on your Android smartphone. So if you are an Android Smartphone user, and want to get WhatsApp video calling feature then read the following part of this blog post carefully.
Update: On 14 Nov 2016 WhatsApp launched video calling for everyone. You just have to download and install latest version WhatsApp on your Phone to get the Voice Calling Feature.