FaceTime has been around since iOS 4, and year after year everything remained pretty much the same, apart from a few minor changes. In iOS 6, calls over cellular networks were finally possible, and audio-only calls were officially supported from iOS 7. But the only feature everyone wanted since FaceTime was something – group video calls – didn't come until iOS 12.1 for iPhone.
The iOS 12.1 update was released on October 30, 2018. It is surprising that Apple has waited so long to support group video calls in FaceTime when many of its competitors – Skype, Snapchat, Facebook Messenger, Google Hangouts, etc. ̵
After Group FaceTime, only a few more important features emerged, such as Live Photo shooting, which became a regular addition in iOS 12.1.1 and, in iOS 13.5, the ability to turn off auto zoom of contact tiles during Group FaceTime when people are speaking. We show how both functions work below.
Go to a section: Max. Users | Supported devices Video facts Start in FaceTime | Start in Messages | Reply in FaceTime | Reply in messages Features during the call (enlarge your tile, enlarge other tiles, live photos, effects, auto tile size change) | Add more people End call | Re-join
How many users can join a FaceTime group?
There can be a total of 32 users on any Group FaceTime at any time, including you; that means 31 additional users besides yourself. You may be able to invite more than 31 other users, but only the first 31 can join.
Any device that supports FaceTime can support Group FaceTime as long as it runs with the correct software. For an iPad, iPhone or iPod touch, they must have at least iOS 12.1.4. For a Mac computer, it is macOS Mojave 10.14.1 or higher. If a user doesn't use supported OS versions on their device, they won't be able to group FaceTime, period.
Note that although Group FaceTime first came out in iOS 12.1 and macOS 10.14.1, it currently only works on iOS 12.1.4 and above and macOS 10.14.3 or above, respectively, due to security improvements. Also, only iOS devices with A8X processor or above can use both video and audio during Group FaceTime calls, while A8 and below can only use audio.
With iOS 12.1.4 or higher:  With iOS 12.1.4 or higher or iPadOS 13.1 or higher:
With macOS Mojave 10.14.3 or higher:  Recommended Accessory: Lamicall iPhone Stand for Charging While FaceTiming ($ 7.99)
Should Anyone Use Video?
No. If you or someone else starts a FaceTime video group, the video camera can always be turned off for everyone in the conversation. So you can have a mix of audio and video users in any Group FaceTime.
Again, not everyone can use video anyway. If you have an iPhone 5 S 6 or 6 Plus, iPad mini 2 or 3, iPad Air (first model) or iPod touch 6th generation, there is no video option and you can only play audio during group conversations.
In the FaceTime app, start a conversation like you would for a one-to-one. Tap the + (plus) icon and search for a contact to add. Tap their name when you see them appear. Repeat searching for and adding contacts until everyone in your group is there. If they are blue, they are fair game. If they are gray, they are not iMessage users or running the required software.
When you have selected all the contacts you want to start a Group FaceTime with, select "Audio" or "Video" to start the group conversation. After that you just have to wait for the others to join.