How to : Join a Group FaceTime call This feature wasn’t ready in time for the release of iOS 12, but soon you will be able to partake in a group FaceTime call with up to 32 participants. To make a group FaceTime video call you simply have to enter more than one contact into the address box when initiating the chat. The interface is a little different: the tiles showing each participant (there can be up to 32) vary in size and prominence depending on how recently that person spoke. Double-tapping a tile brings that person to the front in your view. You can also launch a group FaceTime call from within Messages if a thread is getting particularly out of hand.