Why the device can not read the fingerprint

    1.keep the fingerprint a little wet.
    2.Check the fingerprint press on right place on the sensor.
    3.Test the sensor in the  “Setup”—” Hardware Test”—”Sensor”. Normal the LUM of the sensor is: 130-150.
    4.Active the “Auto Update” function in the device to keep the fingerprint template always in the latest status.