A system provides a database ready for querying and analyzing locations of mobile phone users. The method includes the steps of: determining that the vehicle is unpowered; determining that the vehicle is in a fringe region of a cellular network; and based the determining steps, entering a power-saving mode at the telematics unit. The tip body 2 is radially expandable to facilitate retrieval of a filter into the tip 1, and the columns 3 extend longitudinally along the tip body 2 to prevent buckling of the tip 1 upon retrieval of the filter into the tip. The broadcast program information is acquired from the external apparatus.