Hi all, just started having this problem the other day for no reason where the auto brightness feature has completely stopped working, in addition to this the screen will not shut off during a phone call. I have tried taking the battery out, uninstalling recently installed apps, and calibrating the sensor, nothing has worked. The bonus issue is that I cannot perform a hard reset (holding the power button down for ten seconds until it shuts off) because the phone simply makes the little power down pop-up appear and then the screen dims. It's so weird I have no idea why this is happening. Do you think that a factory reset will fix the issues?