The total cost is then that of the hardware, and the monthly rental of the 'phone. There will be an additional cost, for each 'phone call made, but this will be small if the number of calls is small. For many anti-theft or security applications this may be sufficient. If the vehicle owner wants to know where the vehicle has been, each minute of each day, this can achieved with memory in the hardware. A GSM modem will then be needed on the GPSS PC - which could then also be mobile.
Many combinations are possible.
GPS35 - see the picture on the left. Distributors of the Garmin GPS35 and other GPS receivers may be found on the 'Where to get a GPS' Page . In recent months more people have reported good results using the Falcom A2 GPS pictured on the right. This includes both GPS and mobile 'phone electronics in a small container. The hardware in the vehicle typically represents less than half of this cost.