The most common and important messaging service around the world recently welcomed it’s audience with another revolutionary free service. Whatsapp in past month rolled out it’s free voice call feature, that brings the company in direct confrontation with apps like WeChat, Viber and Line.

A Reddit user earlier posted screenshots of the voice calling feature, supposedly available with the latest WhatsApp version. It’s currently the biggest instant messaging app in the world, with over 700 million active users as of now. However, the move has been released (unofficially) for only a limited number of users in the country. This would suggest a possible testing phase for this service is currently underway though we are awaiting any official response.

Referring to the screenshots, separate screens for placing a voice call to the WhatsApp contacts, call logs and ongoing calls is provided. During a call, there are options for speakerphone, mute, and to even send an instant message.

Previous month, another reddit user posted some screen shots of the messenger application depicting a folder named “Whatsapp Calls”. Whatsapp also released a web app for the Chrome browser that supports Android, BlackBerry and Windows. However iOS users can’t access WhatsApp’s web application.

This current rollout which has not yet been officially announced by WhatsApp appears to be operating via an invite-only scenario.

To get the voice call service, Download the latest version of the app (v2.11.508) via WhatsApp’s website and sideload it. Next step is an invitation from a user that already has the service in the app.

The WhatsApp voice-calling User interface is mostly in-line with the earlier screenshots from last December that were supposedly found by digging around Android app by a Dutch website.

From the looks of it, WhatsApp is clearly preparing the release with a limited trial run. Unless the service faces any issues, a larger rollout may take place in the very near future.

About Author: Nandan Gupta is a Consumer Electronics Expert working with, which is the best hyperlocal marketplace & App in India. He is an engineering graduate in computer science and has been closely following consumer electronics & Smartphone gadgets space from last 5 years. He also is a technology blogger for the past 4 years.