The present invention implements communication control with user’s service subscription information reflected in a mobile communication network. The least significant bits of a sample of the reference signal are stored in a comparison register. The indicia may take on various forms. The electrosensitive fuse is adapted to be activated only after the thermal fuse has been activated at the predetermined operating temperature. In the front part of the basic body a forwardly open slot is formed, which separates two elastically deflectable legs wich clamp the male part in the groove.