GPS jammers are useful, this kind of device can block the GPS signal, suitable for some users who don't want others to know their location.

Some cars purchased by installments or mortgaged cars are equipped with a GPS system, and the real-time location of the car can be known through GPS. If the user does not repay on time, the bank can find a tow truck to tow the user's car away.

The general long-distance bus, the mortgage car will be equipped with GPS positioning device. Some people can find the location of the GPS through the detector and remove it, and some people will put a GPS jammer on the car.

The implementation of the jammer is to shield the mobile phone signal, similar to the wireless signal jammer of the examination room, but not to shield the GPS. Since the GPS location tracker is actually a mobile phone + GPS receiver with an open network, the mobile phone sends the coordinate data of the GPS receiver to the network, and blocking the mobile phone is equivalent to truncating the GPS coordinate network transmission, and the network platform cannot receive the GPS coordinate data. , naturally it cannot be located.