Both the cellular and satellite GPS models behave in similar fashion — that is, they both provide GPS information to NetTrack. However, the cost to send GPS messages over cellular is less than that of satellite. Of course, the cellular devices cannot send data where there is no cellular data coverage. Our philosophy is to look at your coverage area and if you have cellular data coverage from one of our major partner networks (Verizon, AT&T and T-Mobile), then we recommend the Premium Series Vehicle Trackers. If you do not have the proper cellular coverage, then the alternative is the Satellite Equipment Trackers.