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We need to admit - a 4g gps tracking device could be one of the best investments you ever make. But at the same time, there are a few things you need to double-check and understand before making this investment decision. Generally speaking, the GPS4g gps tracking device is a GPS system composed of 24 satellites and software devices to track the vehicle. At first, the Global Positioning System (GPS) was mainly funded and controlled by the United States government for military purposes, and then gradually opened up to the ... more