BigPatents India

The network includes a plurality of mobile stations, each with a mobile equipment and a subscrier module such as a pre-paid SIM card, and a central server. Each subscriber module comprises an account memory in which data are stored related to a plurality of mobile subscriber identities (IMSI 1, IMSI 2, IMSI 3) and a corresponding plurality of credit values (TALK TIME) to be decremented upon use of the network by the subscriber. In the central server, a database stores for each subscriber: one mobile station director number (MSISDN); the different mobile subscriber identities (IMSI 1, IMSI 2, IMSI 3), commonly mapped to said one mobile station directory number (MSISDN, Mobile Number 1); and the corresponding plurality of credit values (40$, 20$, 30$, Subscriber 1).