If the group chat has more than four people, you’ll need to select who to add to the call. Click on the button that has a phone and a plus sign in the top right corner.

The hugely popular instant messaging platform WhatsApp is testing a new change to help make it quicker and easier to add people to group chats.

WhatsApp users have stumbled upon a new button in the app, and it's set to bring some clever functionality to the popular messaging platform.