A: There are three reasons for this problem
It is recommended to use the index finger or middle finger to enroll your fingerprint.
- In cold weather, hands that are too dry will not be recognised, and if your hands are too wet you will not be able to recognise fingerprints any better.
- Place the finger in a proper position, make sure your finger is free from cuts and stains. If the registered finger has such flaws, enroll another finger.
- The fingerprint reading module is faulty, please refer to 2.2 for the solution.