Checking the identification number of a mobile subscriber
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United States of America Patent
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May 25, 1999
Grant Date -
N/A
app pub date -
Nov 21, 1996
filing date -
Nov 24, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to method for checking a personal identification number (PIN) of a subscriber in a mobile equipment (500) employed in a mobile communications system (600), the mobile equipment containing a protected subscriber identity (IMSI, ITSI). The method comprises the steps of requesting (203) the user of the mobile equipment the personal identification number (PIN) of the subscriber, checking (103) the validity of the personal identification number entered by the user, repeating (109) these steps provided that the user does not enter the valid personal identification number, and, when the number of requests (203) and checks (103) of the identification number exceeds a predetermined threshold value, blocking (111) the mobile equipment. According to the invention, protection of a protected subscriber identity is released (112), thus finding out the identity of the subscriber; the subscriber identity as well as and an indication that the mobile equipment has been blocked are transmitted the mobile communications system.
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