Why doesn't the POCO F7 Pro screen turn off during calls?

Sorry for the trouble caused to you. For people with darker and denser hair, the phone’s proximity sensor has difficulty detecting the screen’s position during calls, preventing the screen from turning off. You can try moving your hair aside and bringing the phone closer to the skin to ensure proper detection.
Additionally, if the screen does not turn off when answering a call quickly, try slowing down the movement of bringing the phone to your ear (half a second or more) and adjusting the hair before answering. Keeping the sensor area clean can also help prevent detection issues. These methods can improve the screen-off experience during calls, making usage more convenient.