Location information erase on SIM cards
First Claim
1. A method of organizing a search for a service provider in a wireless device storing location information, the method comprising:
- determining whether the location information is associated with a recently used service provider that is neither a home service provider nor a preferred service provider;
at power down of the wireless device, erasing at least part of the location information associated with the recently used service provider as a result of the determination that the location information is associated with a recently used service provider; and
at power up of the wireless device, selecting a service provider from a list comprising a home service provider and one or more preferred service providers.
6 Assignments
0 Petitions
Accused Products
Abstract
A method and system of erasing at least part of the location information stored on a subscriber identity module (SIM) of a mobile phone. The SIM stores the most recently used service provider in its location information. Either at power down or power up, the location information is erased so during the power up routine, the service provider search schedule will not find a service provider when it first searches the most recently used service provider stored in the location information. In this case, the service provider search routine will appropriately choose either the home service provider or a preferred service provider rather than the service provider stored in the location information. The method of erasing at least part of the location information may be carried out by a program stored on the SIM card or by a wireless network transmitting an instructive signal to the wireless device. The method and system may also provide that if the service provider stored in the location information corresponds to the home service provider or a preferred service provide, then none of the location information is erased.
148 Citations
21 Claims
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1. A method of organizing a search for a service provider in a wireless device storing location information, the method comprising:
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determining whether the location information is associated with a recently used service provider that is neither a home service provider nor a preferred service provider; at power down of the wireless device, erasing at least part of the location information associated with the recently used service provider as a result of the determination that the location information is associated with a recently used service provider; and at power up of the wireless device, selecting a service provider from a list comprising a home service provider and one or more preferred service providers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification