SIM-Lock in certain IMSI-region of SIM-card for prepaid and repaid cards

摘要

Independent use from each other of mobile-radio participant-identification cards and mobile-radio end devices sold as a package is made possible by a procedure and a mobile-radio end device that permit calling with the mobile-radio end device with the inserted mobile-radio participant-identification card only when certain digits of the IMSI of the mobile-radio participant-identification card lie within value ranges stored in the end device.