WhatsApp is going to roll out a beta update for iOs users with the latest features for joining calls. In the new feature, when a person got disconnected, then he/she does not have to take permission from anyone to join the call again. It is available for audio and video calls on WhatsApp. The name of the feature is joinable call on WhatsApp.
At present, if you can not pick a group call on WhatsApp, then you can only see the missed call notification on your phone screen after you miss a voice or video call. Now, you can instantly join the call without asking anyone in the group.
There is another new feature coming up on WhatsApp. WhatsApp is going to introduce a new user interface for taking calls. The latest user interface resembles the facetime of iOS.
Right now, the new features are available only to iOS users, and soon they are going to be rolled out for Android users.