WhatsApp enabled and tested their Voice calling feature to a limited number of users initially and later rolled out to all users and other operating-systems. Leaked screenshots by an German site MacerKopf suggest that popular messaging service is all set to launch video calling feature for it's users.

WhatsApp has over 900M+ users which it acquired in a short span of just 6 years, the free video calling feature on this popular IM service is surely going to give competition substantial jitters of the likes of Apple (FaceTime), Microsoft (Skype), Google (Hangouts) and mobile-carriers.

Just days after WhatsApp introduced the much needed Desktop/Web access for the world's leading instant messenger service, we now have WhatsApp Call feature making it's appearance on some selective installations. It seems the WhatsApp Voice Call feature will be invite only for now where a user who already has the feature can initiate a call to a new user activating it on the other users installation. A semi-functional trick to activate the WhatsApp Call feature before everybody else is shared below.