Subscriber unit and method of operating a subscriber unit

Subscriber device (306, 600) of a communication system, which communication system comprises a server, which subscriber device (306, 600) is a chip module (304, 602) and a controller (603), wherein - the chip module (304, 602) has a data processing unit (605) and a memory (606), in which memory a user identification of the user of the subscriber equipment is stored; - the user equipment comprises a receiving device (601) which is arranged to receive a message sent by the server first signaling message (313), said first signaling message (313) indicates that there is provided a message to retrieve on the server; - the chip module (304, 602) has a signaling device (607), which is arranged at a predetermined dependent on the receipt of messages from the server first signaling message (313) by the receiving means (601) independent event a filter message (312) includes the filtering criteria that specify filtering criteria, which messages are provided on the server to be retrieved from the server to transmit to the control device (603); - the controller ...