First of all, there is no GPS locator without a sim card. We can look at the principle of GPS: the GPS locator obtains satellite signals - > send them to the server through the network - > the server calculates the latitude and longitude and analyzes the specific location - > Display them through the PC or APP.

　　It can be seen from the principle that the main purpose of the GPS locator is to obtain satellite signals and send them to the server, and to send information is to use the network, that is, the network that needs a SIM card to send. So a GPS locator without a sim card does not exist.

　　In fact, these are the activities of businesses for promotion, do you think the traffic of GPS locator is really free? The partners who have bought the locator all know that if you buy the card together when you buy the locator, the card is generally free for a year, and the fee begins to be paid from the second year, some businesses seize this point, install the sim card in the locator, so that you can buy the card while buying the locator, and of course, you do not need to recharge any traffic fees in the first year. In the second year, the card flow of the locator is exhausted, your transaction rights time has passed, you can't return it, and even the merchant can't find it.

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Origin of GPS development