In the conversation list:
- Select the group conversation:
- Select the camera button to start the video conference:
- Select the hang-up button to end the call:
Be aware: When you join a conference call you will be automatically muted.
Please be aware on iOS:
Your call ends when you, as a recipient, lock your screen. It is the expected iOS behavior.
To avoid this case:
- Open your device settings.
- Select Accessibility.
- Select Touch.
- Enable Prevent Lock to End Call.