Group call refers to half-duplex communication (that is, one to many) between a calling party and multiple called parties. During a group call, only one group member can speak at the same time, and other members can only answer. Group call can be divided into temporary group call and predefined group call. The members of the temporary group are customized by users on the mobile terminal, and the group information is stored in the terminal. The predefined groups are managed by group administrators or ordinary group administrators, and the group information is stored in the server of the operator. For more service benefits, click "official website" below. Customer service 324 will answer your questions.