SIM car key uses the mobile phone as the digital key of the car. Based on the security chip of SIM card and NFC communication ability, the car key information of different models is input into the SIM card of mobile phone to realize the convenient function of opening the door and starting the car.
Of course, there is no need to worry about security. Because the car key information is stored in the chip, it will not be read by other applications in the mobile phone. What's more, the mobile phone can be used after it is turned off, which solves the embarrassment of no electricity!