How do I quickly join a group and use the intercom function?

Enter the same 6-digit channel number as your friends to join the group room on the Group interface.

Questions about joining a group
How do I quickly join a group and use the intercom function?
I am not receiving message from group members. How do I fix it?
Why can’t I send a voice message?
I cannot join a group. How do I solve this?
Why do I lose sound when I connect to the intercom?
Why can't I talk through the helmet when it’s connected to the app