An apparatus for use in a mobile communications system is provided. The apparatus is adapted to store messages for subsequent retrieval by a subscriber of the mobile communications system. The apparatus is further adapted to identify a first subscriber making a call to retrieve a message by using an identification signal automatically forwarded to the apparatus during call establishment. The signal may identify the equipment being used by the subscriber. The apparatus may be further adapted to identify a second subscriber, on receipt of a request from the second subscriber during the call, by using information supplied by the second subscriber during the call.