196866 Cell Phone Application

I need to Java developer to develop a cell phone application that will determine via GSM and based on cell tower locations the users proximity and identify the cell tower they are closest to. The location must be compared to google maps to determine the users location. The software must also be able to call a selected phone number as a result of a database query. This must happen behind the scenes and without user intervention, however, can also be invoked by the user.