It shows you the SIM serial number, IMSI, Operator Code, IMEI, network type, CellID and LAC amongst other data. Also it can track the Cell ID, signal strength and store the GPS locations. All collected data can be dumped to a KML file or displayed in the application. For more information read the "Show Maps"=>About section.
Tags: rawphone , cell id , small basic , code storing signal strength , cell id signal strenth widget , rawphone.org