From last one year company has been promising to customers phone call facility from the App, Now it seems to available finally.
WhatsApp is rolling out with its long-expected voice calling feature, with some users in India which appears to be available on invite-only basis, as of now claiming to have gained early access to the service.The invite-only basis basically means that users will get a call through WhatsApp from someone who already has the feature updated. The feature is also restricted to Android only and you will need the updated 2.11.508 version to access the app.
According to the images posted, users who receive the voice-calling feature will notice an icon for it, beside the Chats and Contacts tabs. The call interface seems to quite similar to a smartphone’s contact directory. The app keeps a record of recent WhatsApp calls as well.