System and method for using multiple networks to estimate a location of a mobile communication terminal

An interrogation device, comprising:

• an antenna;
• a transceiver;
• and
• a processor, wherein the processor is configured by program code to, via the transceiver and the antenna:
• drive a mobile phone to receive signals from both in-network base stations and out-of-network base stations;
• receive, in response to the driving, a multi-network network-measurement-report (NMR) from the mobile phone, the multi-network NMR comprising signal strengths of each received signal, wherein each signal strength corresponds to a quality of service provided by each base station;
• estimate, using the multi-network NMR, a location of the mobile phone;
• and
• compare the quality of service provided by the in-network base stations to the quality of service provided by the out-of-network base stations at the location of the mobile phone.

A non-transitory computer-readable medium storing program instructions that when executed by a processor of an interrogation device cause the interrogation device to:

• drive a mobile phone to receive signals from both in-network base stations and out-of-network base stations;
• receive, in response to the driving, a multi-network network-measurement-report (NMR) from the mobile phone, the multi-network NMR comprising signal strengths of each received signal, wherein each signal strength corresponds to a quality of service provided by each base station;
• estimate, using the multi-network NMR, a location of the mobile phone;
• and
• compare the quality of service provided by the in-network base stations to the quality of service provided by the out-of-network base stations at the location of the mobile phone.