Patent ID: 7113802

Claim:
A method of providing communication between a mobile terminal and a wireless communications system including a Mobile Switching Center (MSC) and a base station comprising: using a 10 digit Mobile Identity Number (MIN) identifier for identifying the mobile terminal in messages using a mobile terminal identifier sent from the MSC to the mobile terminal; using a 15 digit MIN-based International Mobile Station Identity (IMSI) identifier for identifying the mobile terminal in messages using a mobile terminal identifier sent from the mobile terminal to the MSC, wherein the 15 digit MIN-based IMSI includes a 5 digit MIN Escape Code (MEC) and the MIN; collecting 5 digit MECs programmed in mobile terminals communicating directly with their home systems; collecting 5 digit MEC programmed in mobile terminals visiting visited systems; comparing the collected MECs with the MECs stored in the system; determining which collected MECs are incorrect; determining which mobile terminals have incorrect MECs; and correcting the MECs for mobile terminals having incorrect MECs.