Well, some vehicle tracking device has a subscription from a GIS co. And i tell u that is expensive. Try TxtAlert device na GSM tracking via SMS but this is less expensive. One-time payment lang on the device and the rest, u already has the control to your car. PM me for info and brochure. FYI, some tsikoteers already has scheduled their car to be installed with this device after a very convincing demo last week.