I have see some questions recently on how to beat GPS tracking systems, especially how to beat the gps tracking on nextel company radios. One way to do this is to use a GPS jammer. These devices basically send out an isolation frequency signal that prevents the GPS device from communicating with the GPS satellites. When wanting to jam a company radio, or gps cell phone, you will want a device that is small enough to carry in your pocket and can be recharged in your car as well as at home. Preferably, you would want to find a GPS Jamming device that can be used WHILE it is being charged so if you are in your car for long periods of time, you can still use the device to jam the GPS tracking system. That is the best way to beat a GPS tracking system whether it is in your car, or your nextel company radio, or cell phone. There are many options available today.