SIM card secured subscriber unit
First Claim
1. A method of operating a subscriber unit having a subscriber identification module SIM card reader, said method comprising the steps of:
- reading a first preprogrammed signature value from a subscriber identification module (SIM) card;
comparing said first preprogrammed signature value to a preprogrammed signature value stored in said subscriber unit, said preprogrammed signature value being singularly unique to said subscriber unit;
enabling communications functions of said subscriber unit only if said preprogrammed signature value corresponds to said first preprogrammed signature value prompting a user to enter a password;
comparing said password with a predetermined password stored in said subscriber unit; and
enabling predetermined operational features of said subscriber unit that were not otherwise accessible via a proper SIM card only if said password matches said predetermined password.
3 Assignments
0 Petitions
Accused Products
Abstract
A subscriber unit (101) includes a SIM card reader (107) for receiving a SIM card (105). The subscriber unit (101) is serialized and has stored therein an alphanumeric signature value which is associated with the specific serialized subscriber unit (101). The subscriber unit (101) is fully operable only with a SIM card (105) having stored therein the specific signature value corresponding to the serialized subscriber unit (101). A user having a SIM card (105) containing the specific signature value for that subscriber unit can select a mode of user operation which will permit multiple selected SIM card holding users to use the subscriber unit.
59 Citations
14 Claims
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1. A method of operating a subscriber unit having a subscriber identification module SIM card reader, said method comprising the steps of:
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reading a first preprogrammed signature value from a subscriber identification module (SIM) card; comparing said first preprogrammed signature value to a preprogrammed signature value stored in said subscriber unit, said preprogrammed signature value being singularly unique to said subscriber unit; enabling communications functions of said subscriber unit only if said preprogrammed signature value corresponds to said first preprogrammed signature value prompting a user to enter a password; comparing said password with a predetermined password stored in said subscriber unit; and enabling predetermined operational features of said subscriber unit that were not otherwise accessible via a proper SIM card only if said password matches said predetermined password. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A subscriber unit useable with a subscriber identification module (SIM) card, comprising:
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a SIM card reader for receiving and reading information stored on said SIM card; a memory storing a specific predetermined signature value, said specific predetermined signature value being unique to said subscriber unit; a controller for comparing a signature value stored on said SIM card with said specific predetermined first signature value stored in said memory, said controller denying access to said subscriber unit if said SIM card signature value does not match said specific predetermined signature value, said controller allowing access to substantially all functional operability of said subscriber unit if said SIM card signature value matches said specific predetermined signature value thereby establishing a proper SIM card; memory means for storing a user password; a display means for prompting a user to enter a password; user means for said user to enter a user password; and said controller comparing said user entered password with said stored user password and enabling predetermined operational features of said subscriber unit that were not otherwise accessible via a proper SIM card only if said stored user password and said entered user password match. - View Dependent Claims (8, 9, 10)
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11. A subscriber unit, comprising:
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a subscriber identification module SIM card, said SIM card containing a signature value; a SIM card reader for receiving and reading information stored in said SIM card; a memory storing a specific predetermined signature value, said specific predetermined signature value being unique to said subscriber unit; a controller for comparing said signature value stored on said SIM card with said specific predetermined signature value stored in said memory, said controller denying access to at least certain functions of said subscriber unit if said SIM card signature value does not match said specific predetermined signature value, said controller allowing access to substantially all functional operability of said subscriber unit if said SIM card first signature value matches said predetermined signature value thereby resulting in a proper SIM card determination; and memory means for storing a user password; a display means for prompting a user to enter a password; user means for said user to enter a user password; and said controller comparing said user entered password with said stored user password and enabling predetermined operational features of said subscriber unit that were not otherwise accessible via a proper SIM card only if said stored user password and said entered user password match. - View Dependent Claims (12, 13, 14)
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Specification