Cheap GPS Car Tracker To implement a locating tracking vehicle, you must insert a SIM card in the positioner. Why is this? First, let's briefly understand the principle of positioning tracking of Cheap GPS Car Tracker. In fact, the working principle of CHEAP GPS Car Tracker is relatively simple, that is, the positioner can view the Chet GPS Car Tracker by using the data sent by the GPS satellite, and then view the Cheap GPS Car Tracker by the mobile phone or computer by transmitting these data to the ground. The position of the vehicle is installed. CHEAP GPS Car Tracker requires data to be transmitted to the server during the implementation of the locating tracking, and only the step can we see the position, how to implement the transmission of these data, then you need to use it SIM card. We all know that the SIM card is a communication function. This transfer of media us usually call him, which is GPRS. If the SIM card is not inserted in the Cheap GPS Car Tracker, the positioning data cannot be transferred to the server, and we cannot see the location of the vehicle on the map. If a friend who is more concerned about Cheap GPS Car Tracker may hear the Cheap GPS Car Tracker of the free card, then what these devices use to transfer data? In fact, these so-called CHEAP GPS Car Trackers do not say not to install SIM cards, but these devices will directly post the SIM card chip directly on the PCBA board in the process of production, so the external claim It's the free card! Said so much, you should understand why Cheap GPS Car Tracker wants to install SIM card.

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