Procedure for blocking certain international mobile subscriber identity ranges of prepaid and postpaid smart cards
First Claim
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1. A procedure for checking the validity of smart cards in a mobile-radio end device, comprising the steps of:
- (a) reading, by a mobile-radio end device, a portion of data stored in an International Mobile Subscriber Identity of a smart card in the mobile-radio end device;
(b) comparing the at least a portion of data with allowed value range stored in the mobile-radio end device; and
(c) allowing operation of the mobile-radio end device with the smart card by the mobile-radio end device when the portion of data read from the smart card in said step (a) is within the allowed value range stored in the mobile-radio end device.
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Abstract
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.
34 Citations
16 Claims
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1. A procedure for checking the validity of smart cards in a mobile-radio end device, comprising the steps of:
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(a) reading, by a mobile-radio end device, a portion of data stored in an International Mobile Subscriber Identity of a smart card in the mobile-radio end device;
(b) comparing the at least a portion of data with allowed value range stored in the mobile-radio end device; and
(c) allowing operation of the mobile-radio end device with the smart card by the mobile-radio end device when the portion of data read from the smart card in said step (a) is within the allowed value range stored in the mobile-radio end device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A mobile-radio end device, comprising:
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a receiving device operatively arranged for receiving a Subscriber Identity Module card;
a reading device connected to said receiving device and operatively arranged for reading a portion of data stored on the Subscriber Identity Module card received in said receiving device;
a memory having an allowed value range stored therein;
a comparison device for comparing at least a portion of said number read by said reading device with said allowed value range stored in said memory; and
means for allowing operation of said mobile-radio end device with the Subscriber Identity Module card only when said at least a portion of data read by said reading device is within said allowed value range in said memory. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification