Data stored about user equipment, such as mobile phones, that is stored in a Home Location Register of at least one wireless, cellular voice network communications system configured, for example, as a 3G network deployment, is augmented with supplemental information and is communicated automatically to active users in the network. The invention is particularly advantageous for mobile systems that are deployable where normal networks have been disrupted, such as among emergency personnel who need to communicate and cooperate as a group at a disaster scene. Supplemental information includes, for example, the identity of a user or device that has entered or exited the network, the function, position, rank, responsibility level, etc., that each user has, and what group the user is affiliated with.