WhatsApp appears to have opened its voice calling feature to all Android users, with the invite window now open for several hours. The world's most popular messaging app has been gradually rolling out this feature by opening the invite window only for a few hours at a time. This time however, WhatsApp may have opened the floodgates, reports Android Police.

Having established itself as the world's most popular messaging app with over 700 million monthly active users, WhatsApp seems to be augmenting its offering by adding features available in competing messaging apps. WhatsApp for Android users also recently got a Web version that works well. Both these features have been available for some time with competing messaging apps such as iMessage (calling via FaceTime), Line, Viber, among others.

In short :

Follow the steps:

1) Just visit the following link and download latest version of whats app or update your whats app through playstore : DOWNLOAD MIRROR

2) Give me a text message on 9807612208 for an invite call then after you will get calling feature.

any problem ?? you are free to comment !!!!