A method and system for conveying location-granularity preferences with location-based service requests. A client station will detect a request to initiate a voice call, and before actually initiating the call the client station will send a message into a network indicating how to carry out a location-based service. In this manner, each time the client station accesses a location-based service, the client station will automatically send the instruction message to the service provider directing the provider how to carry out the service. Upon receiving the instructions, the location-based service provider may proceed to determine the location of the client station. The location-based service provider may then adjust the location of the client station according to the instructions. The service provider could then return the location of the client station, adjusted according to the instructions, directly to a location-based application, to provide the requested location-based service to the client station.