| 摘要 |
The invention relates to a method at a wireless telecommunications system which makes possible an automatic activation respective deactivation of a SIM locking function in a GSM metwork. Before a telecommunication terminal has been distributed to a user, a telephone and a SIM-card are adapted to each other. The in the connection included SIM locking function results in that the user cannot utilize other SIM-cards than those which are in the package when the telephone is delivered to the customer. The invention is characterized by a method which implies that the SIM locking function can be unlocked by means of utilizing SIM toolkit functions and a carrier service, such as SMS or USSD. The unlocking of the SIM locking function is controlled by different criteria such as when the customer has transmitted his/her undersigned agreement to the network operator. |
