Because the car GPS tracker does not need real-time positioning, as long as it is sent intermittently, the stability of the SMS is higher and the coverage is wider.

There are many ways to issue instructions to the GPS locator on the car: SMS, computer client, mobile phone applet, etc. Different companies have two to three methods. It is not the original host who only uses SMS as a control command. The platform sends usable traffic. What you want to ask is the device's SMS remote launch. The device is online for the first time. Generally, the SMS remote launch is used. This also has a small program. Edit the corresponding content through the small program and send it to the sim card number on the device to go online.

The GPS signal jamming system is designed to suppress the signal of the global satellite navigation GPS system in the range of 1500-1600MHz. The jammer makes it impossible for GPS satellites to monitor the location of cars and all vehicles through GPS, and the gps jammer device will not interfere with mobile phones and other devices. Gps jammers can range from 5 to 15 meters, which is sufficient for cars and trucks, cars and buses, because the tracker is usually installed in the cab inside the car. After starting the connection through the car cigarette lighter, the device immediately starts to work and generates radio noise (interference) in the range of 1500-1600 MHz (L1/L2) within a 15-meter radius.