1.proximity sensor is not working properly. When I am on a call and hold the phone close to my ear, the screen turns off as expected. However, as soon as I move my neck slightly to the right, left, up, or down, the screen automatically turns on even though the phone is still against my ear. The same thing happens when I am lying on the bed while talking. In short, even a small movement of my neck makes the screen turn on automatically during calls, which should not happen.