Criminals try to stay one ahead on technology curve. To defeat criminals you have to block all the weaknesses in the system. This miniture circuit jamming technology was invented by Israeli Army to jam the cell phone signals of the PLO, about a decade ago. Now this is being copied by the Chinese and sold to anyone who can buy and do whatever with it. To block this threat, the tracker companies must have something in the pipeline. One simple solution is use Multiple Channels at various frequencies, by the tracker, if one channel is blocked at a specific frequency, by this jammer, then other channels should be able to send the location of the car. Any good electrical engineer can figure out a solution.