A. Please set the SIM card service password in a timely manner before installing the SIM card.

　　B. The implementation of various functions of F300 requires the SIM card to support SMS SMS and GPRS/CDMA functions (internet CMNET services). Please confirm whether the SIM card has the above functions (if monitoring and calling functions are required, the SIM card also needs to support voice calling functions).

　　C. Please install or remove the SIM card only after the device is completely powered off, otherwise there may be a risk of burning the SIM card due to live operation.

　　D. To install or remove a SIM card, use a small "+" screwdriver to insert it into the card retrieval hole on the back of the device and force it inward until the SIM card holder automatically exits the host.

　　How to install

　　(1) First, check whether all functions of the vehicle are normal. For example: headlights, small lights, turn signals, fog lights, ACC, CD player, electric window, original car remote control center control, engine start, engine running, etc.

　　(2) Check whether the connection of various decorative parts in the car is standard, and whether there is any damage to the decorative parts in the car.

　　(3) Check whether the connecting wires related to this product are damaged or have exposed copper cores.

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