Source: https://www.naijacolumn.com.ng/2018/08/whatsapp-rolls-out-group-calling-for.html

Popular messaging app WhatsApp has announced a new exciting feature, group calling for video and voice. The feature puts it head to head with Skype and other audio and video conferencing apps. WhatsApp wrote:

Over the last couple years, people have enjoyed making voice and video calls on WhatsApp. In fact, our users spend over 2 billion minutes on calls per day. We're excited to announce that group calls for voice and video are coming to WhatsApp starting today.
You can make a group call with up to four people total - anytime and anywhere. Just start a one-on-one voice or video call and tap the new "add participant" button in the top right corner to add more contacts to the call.
Group calls are always end-to-end encrypted, and we've designed calling to work reliably around the world in different network conditions. The feature is currently rolling out on the iPhone and Android versions of our app.