The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2012
Filed:
Jul. 29, 2008
Michael Edward Prise, Kirkland, WA (US);
Michael Edward Prise, Kirkland, WA (US);
AT&T Mobility II LLC, Atlanta, GA (US);
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 provide, 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.