| 摘要 |
The invention refers to a method for changing a subscription (A, B) for a mobile telecommunications network on a security module (CA) SIM, USIM, where an old subscription (A) being initially activated on the security module (CA) is to be substituted by a new subscription (B), each of the old and new subscriptions (A, B) being associated with a unique subscriber identity (SIA, SIB) IMSI and a number code (SNA) MSISDN being assigned to the old subscription (A), where the number code (SNA) is provided for calling the subscriber identity (SIA) of the old subscription (A) via the mobile telecommunications network. In a step a), the new deactivated subscription (B) is loaded on the security module (CA). In a step b), the number code (SNA) of the old subscription (A) is assigned to the new subscription (B) via a number portability service (MNP) or mapping database service while the new subscription (B) loaded on the security module (CA) remains deactivated and the old subscription (A) is still activated. Upon completion of the number portability service (MNP) in step b), the new subscription (B) loaded on the security module (CA) is activated in a step c), resulting in a substitution of the old subscription (A) by the new subscription (B). |
