So I have heard the scenario and I do not want to be put in the predicament that I could lose not only my driver, my customer and all the freight on board the truck. But if I have GPS truck tracking how will I know that it will work? I thought that I was safe when I bought a cell phone for my driver. Now I am being told that it might not be safe because it can go in and out of coverage. Will the GPS system always have coverage with it or will I need to buy something else later on?