I bought a cheap tracker from Amazon for one of my cars here in the states. Service was about 10 or 20 bucks a month if I recall. Only problem was that it wouldn't work on Mexican cell networks. Anybody know of a similar device that will work on both sides of the border? There are so many different ones for sale but sifting through all the descriptions to see if they work internationally is tedious, and most only work in the US.