What is the meaning of GPS tracker free card
The GPS tracker itself does not require a SIM card. It is itself a complete system. As long as the positioner is powered, it can receive signals from more than three satellites for positioning. However, this positioning is a two-way process, that is, the locator receives the information, and also transmits and receives its own positioning information through the device, and calculates and receives the transmitted information to determine the location of the GPS device. If there is no SIM card, it is equivalent to no network, GPS information can not be shared with other devices, and the positioning platform software does not have your location information. The platform is the medium for testing vehicles and the point of concentration for processing equipment. Only through the platform software can the positioning data be parsed into a Chinese address, realizing historical trajectories, electronic fences, mobile phones and other functions. Therefore, the GPS tracker, SIM card, a...