WhatsApp Voice Calling Feature Available On Android, Need A Invite To Get It.
A cross platform messaging app, Whatsapp messenger, which allows user to send messages, now added the latest feature of voice calling. To get this feature, Android users need to update to the latest version and then find out a friend who already has the feature. After this, your friend, who has who has that facility should call you up to activate the facility.
If some one calls a user who has the older version of the app, the message tells the user that the app needs to be updated. The version of WhatsApp that supports calling is 2.11.528. Initially, when WhatsApp was testing this feature in a limited way, it worked only on Android phones running the Lollipop.