Abstract: Method, mobile station and radio communications system for controlling security-related functions for call handling. Based on the known method and radio communications system for controlling the security-related functions for call handling with subscriber authentication and secrecy of the information, a ciphering request having an identifier (cimode) is received and evaluated by the mobile station (MS) in order to determine whether the communications network wishes to have connections on the air interface (AIF) with ciphered information or with unciphered information. In this case, the mobile station (MS) can be switched under subscriber control to an operating mode in which the connection (for example v1) is terminated if the received identifier (cimode) allows connections with unciphered information.

Abstract: A method and communication system for the first-time entry of subscriber data of a mobile subscriber into a central subscriber data base wherein entry composed of a special telephone number and of blocking information for temporarily barring calls for the mobile subscriber is formed in at least one central subscriber data base and is transferred into a decentralized subscriber data base that is the first one responsible for the location registration for the mobile radio telephone subscriber on the basis of his current location. As soon as the mobile subscriber makes an outgoing call for the first time via a radio telephone subscriber station, a connection setup occurs to a calling point on the basis of the special telephone number stored in the decentralized subscriber data base. The subscriber data, including a mobile subscriber telephone number is entered into the central subscriber data base via the calling point, and the blocking information reset therein and the special telephone number is deleted.