1、? Video call occupancy rate
If you are making a video call, you will not be able to use the face unlock function at this time, and "Camera occupied" will be displayed on the screen. After the video call is hung up, you can continue to use the face unlock function. When making a video call, it is recommended that you use your fingerprint or password to unlock it temporarily;
2. Camera occupancy
If the background application calls the camera, you can't use the face to unlock it at this time. You can try to clear the background application and see if the face unlocking function can be restored.
If you still have more doubts, you can enter vivo official website-My-Online Customer Service-Enter labor and consult online customer service feedback.