How do I make group calls on my Portal?
With Portal, you can add up to seven Messenger connections to a call for a total of eight people, including yourself. Otherwise you can add up to three WhatsApp contacts to a call for a total of four people, including yourself.
When you make a call from your Portal contacts, you can't have both Messenger and ... You or other connections on your call can add any Facebook friends or Messenger ... Start a call with one of the contacts you'd like to join the group call.