Method for telecommunication, identification module and computerised service unit

To a user, the user (2) and a interview communication network (VPMN), wherein in a mobile wireless network and registers identification module (SIM) which is connected with the aid of a terminal device, and automatic or the base inquired (S1 (1) is transmitted (S2) to the belong to interview communication network (VPMN) are area user identity code (IMSI-P) is a service device of computerizing. Memory and activation the user distinguishing module of the interview communication network (VPMN) of a user identity code (IMSI-P) for obtaining. The user hereafter capable of interview communication network (VPMN) and local user registration.