| 摘要 |
Procedure and system for the control of a subscriber identity module (SIM) containing a subscriber identity code (IMSI1) and a key (K1) in a data communication system, comprising a subscriber register (HLR1, HLR2), a message transmission system (SMSC) and a mobile station (MS) to which the subscriber identity module is connected. A record is created in the subscriber register when a first subscription for the subscriber is opened, said record comprising a subscription specific call number (MSISDNx), an encryption code (K i) and a subscriber identity code (IMSI1) associated with the subscription. A second subscription associated with the subscriber identity module (SIM) is opened; a record comprising the call number (MSISDN), subscriber identity code (IMSI2) and encryption key (K i) corresponding to the second subscription is created in the subscriber register (HLR2); a message (SMS) is sent to the first subscription; and, based on the message, the data corresponding to the first subscription stored in the subscriber identity module are changed into data corresponding to the second subscription.
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