Thanks speedgear2, I agree with you 100% that tracker helps a lot.
Liberty Police Station police wala told me that a car stolen 2 days ago from exactly the same place was recovered from a far off area (he mentioned a village name form punjab i guess, but i don't remember the name exactly) because it had tracker installed. And two culprits were arrested who were are in jail now.
Also our neighbours Mehran was recovered within 1 hour of being stolen because tracker company guided them as the thief was driving away the car. The thief eventually when got to know that some cars are following him, left the car and ran away.