Facebook Messenger is one of the most popular messaging services today, boasting over 900 million monthly active users. However, since competition in this market is increasingly fierce, to maintain momentum the social network has to keep improving its service. Earlier this month, at its F8 developer conference, Facebook announced support for chat bots with the purpose of enabling businesses to deliver better customer support, and now it is rolling out group calling to Messenger users across the globe. "From any group conversations, just tap on the phone icon to initiate a group call. You can then manage individual participants on… [Continue Reading]