Expert's Help Needed: Gsm Security system Using Cell Info Display

hi
I m gona start ma new project on GSM vehical security system using 8051 or PIC uC. The security system is based on Cell info Display reterived from the respective GSM network (As in Pakistan Telenor offers such facilty that it shows the location of the respective place or the transmiter of which it is connnected. ) so plz guide me how to get the cell info and which cell phone to use and how to send back the collected data to a predefined number..

Note: please i want an urgent response of the experts using this great community..

I would ask Pakistan Telenor in the first place as they are the experts
in how the data is supplied.
That may dictate the choice of phone.

what?