Patent ID: 8688076

Claim:
A subscriber identifier for subscriber authentication in a mobile telecommunications network, comprising a memory device containing a first subscription data record for subscriber authentication in a first mobile telecommunications network, the memory device further containing a second subscription data record for subscriber authentication in a second mobile telecommunications network, based on an available mobile telecommunications network, one of the contained subscription data records being usable for subscriber authentication, the subscriber identifier further comprising a controller that is configured to activate, based on a received identifier of the available mobile telecommunications network, a subscription data record for subscriber authentication, wherein the controller is further configured to activate a prescribed subscription data record for use in subscriber authentication if no identifier of the first mobile telecommunications network or the second mobile telecommunications network is received, wherein the prescribed subscription data record is selected according to at least one prescribed criterion, and wherein the controller is configured to activate the prescribed subscription data record if a subscription data record associated with an available mobile telecommunications network is incomplete, and wherein after activation of the prescribed subscription data record, a subscriber authentication using the prescribed subscription data record is performed and information is transmitted from the mobile telecommunications network to the subscriber identifier and the information is stored in the incomplete data record.