How a GPS tracking device uploading location information to tracking server?
There are two parts of the GPS tracker, this first one is positioning system, it is to calculate the geographical coordinates of the locator by receiving the sky satellite signal, this signal can be found as long as you can see the sky.
The second part is the communication system. It transfers coordinate information and car status information calculated by the positioning system to the server or mobile phone. GPRS is to transmit the data to server to finish the data transfer.