gps for car tracking hidden Why do you need to install a mobile SIM card? from yilian's blog

I talked to some customers during consultation, and many customers reported that they did not know why GPS for car tracking hidden uses SIM cards, and every GPS device produced by the company needs to install a mobile phone SIM card? So what does the SIM card do?

This problem starts from the principle of GPS: GPS for car tracking hidden obtains satellite signals to calculate latitude and longitude, and then transmits it to the server through the SIM card network. The server parses the specific information and presents it on the mobile APP or computer.

Therefore, the SIM card plays a role in data transmission.

Of course, there are still some manufacturers who advertise that they "don't need a SIM card", but this is just the idea of the manufacturer stealing the concept. In fact, they solder the SIM chip directly to the device. This makes customers think that they don't need a SIM card.

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