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Cellular fraud prevention using selective roaming

  • US 6,058,301 A
  • Filed: 11/27/1996
  • Issued: 05/02/2000
  • Est. Priority Date: 11/27/1996
  • Status: Expired due to Term
First Claim
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1. A method for preventing roaming fraud in a cellular telephone system, comprising the steps of:

  • (a) receiving a request to authorize a call attempt by a cellular phone in a foreign service area;

    (b) determining whether the call attempt by the cellular phone exceeds a roaming privilege of the cellular phone, the determining step comprising the step of checking a database stored in a data storage device to determine the roaming privilege of the cellular phone, the database comprising a Home Locator Register (HLR) for storing roaming information for subscribers of the home service area;

    (c) authenticating the cellular phone using secondary identification data when the call attempt exceeds the roaming privilege for the cellular phone; and

    (d) authorizing the call attempt by the cellular phone in the foreign service area when a proper response is provided by the cellular phone at the authenticating step.

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