Patent ID: 8121613

Claim:
A method for obtaining a subscriber location for a call from a mobile phone, wherein the mobile phone is coupled to a cellular base station via a subscriber access line, the cellular base station having a base station identity, wherein the cellular base station is coupled to a cellular phone system, comprising: (a) sending a query from the cellular phone system to a subscriber location query system, wherein the query comprises the base station identity; (b) receiving from the query system the subscriber location corresponding to the base station identity, wherein the subscriber location comprises a geophysical property of the cellular base station to which the subscriber access line is coupled; and (c) determining if the mobile phone has changed locations, wherein the mobile phone is coupled to a current cellular base station via a current subscriber access line, comprising: (c1) obtaining by the mobile phone a current base station identity for the current cellular base station, and (c2) comparing the current base station identity with the base station identity.