Facebook announced last week that it would provide world-wide group calling on its Messenger app. Members engaged in a group conversation can tap the phone icon on their screen to initiate a group call. They can manage individual participants on the next screen.

Members of a group who miss the initial call can tap the phone icon in the group chat to join the call while it’s in progress.

The feature allows up to 50 participants and is available only in the latest version of Messenger.

This feature may end up affecting the cell phone carriers bottom line.