1, when the phone is turned off, it will not be unlocked when facing the face. You need to trigger the bright screen to recognize the face and unlock it. You can press the power button to light up the screen, or you can use it with the "Raise your hand to light up the screen" function, and set >; Fingerprint, face and password >; Face > raise your hand to light up the screen > turn on the function.
2. When unlocking the face, please aim the phone at the face to ensure that you can take a clear face photo.
3. After the entered face has been used for a period of time, it is recommended to re-enter.
4. In dark or strong light environment, it is recommended to use fingerprints to unlock.
If you still have more doubts, you can enter vivo official website-My-Online Customer Service-Enter labor and consult online customer service feedback.