Abstract: With the present method for simplifying the exchange of a SIM card of subscribers of a digital mobile communications network, the subscriber disposes of an old active SIM card and makes us of a new inactive SIM card in a mobile terminal. The invention provides that the proper activation of the new SIM card and deactivation of the old SIM are carried out while in dialog with subscribers via a migration server connected to the mobile communication network.

Abstract: The invention relates to a method for simplifying the exchange of a SIM card of subscribers of a digital mobile communications network. According to the invention, the subscriber disposes of an old active SIM card and of a new inactive SIM card for use in a mobile terminal. The invention provides that the proper activation of the new SIM card and deactivation of the old SIM card are carried out while in dialog with the subscriber via a migration server connected to the mobile communications network.

Abstract: A method of operating a cellular telecommunication system (30) wherein one mobile station (32) may communicate with a number of base stations (33, 34) in a macrodiversity mode, and wherein each of the base stations (33, 34) is provided with a target signal-to-interference (SIR) value. An actual load is provided for each of the base stations (33, 34), and the target SIR value of that base station (33) is increased which carries a high actual load.

Abstract: The invention concerns a method for radio transmission in a cellular mobile radio communications network (1). The mobile radio communications network (1) has a hierarchical radio cell structure with small radio cells (2) and with at least one larger radio cell (3) superposed on the small radio cells (2). In order to render possible real-time radio transmission, particularly real-time data transmission, in a mobile radio communications network (1) with a hierarchical radio cell structure and to improve the transmission quality, it is proposed to execute a real-time radio transmission via the at least one superposed larger radio cell (3). A non-real-time data transmission is preferably executed via a smaller radio cell (2).