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Method and system for preventing mobile roaming fraud

  • US 5,953,653 A
  • Filed: 01/28/1997
  • Issued: 09/14/1999
  • Est. Priority Date: 01/28/1997
  • Status: Expired due to Term
First Claim
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1. For use in a mobile telephone system including a home carrier mobile network providing mobile telephone services to a mobile subscriber having a mobile telephone unit assigned thereto and further including a service profile database for storing data to be verified by a serving carrier mobile network, a method for detecting and preventing a fraudulent request for mobile telephone service to be provided to the mobile subscriber by one of a plurality of serving networks, the method comprising:

  • storing home/serving market identification code combinations in a first database identifying at least one of the plurality of serving networks subject to fraud;

    storing authorized subscriber identification data in a second database identifying authorized serving networks associated with the mobile subscriber;

    receiving a power-on signal from the mobile telephone unit when the mobile telephone unit is in one of the plurality of serving networks;

    determining if the subscriber is authorized to receive mobile service in the serving network based on the power-on signal, the home/serving market identification code combinations stored in the first database, and the authorized subscriber identification data stored in the second database; and

    if the subscriber is not authorized to receive service in the serving network, updating the data stored in the service profile database to indicate the subscriber is not authorized to receive mobile service in the serving network and must be routed to a customer service representative for validation immediately upon placing an outgoing call following the power-on signal.

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