Touching in a certain area of my screen doesn't respond. If I go to sound settings, I am unable to move the call volume slider left or right. When I rotate the phone, I can move the slider because it's now on a different portion of the screen. I have the display settings set to "small". Setting the display size back to "default", the portion of the screen seems to work fine when I move the slider in the same area. Can anyone confirm if this happens to you: setting display size to small and then going to sound options and adjusting call volume slider?