My Samsung phone has a setting to automatically adjust brightness. I don't want this to happen so I keep the setting turned off. It drives me crazy when the phone adjusts. But the setting constantly becomes undone. What's the point of having this setting if Google Samsung don't listen to it? The same thing happens when my battery gets low it lowers the brightness on my screen. It drives me crazy. I only use my phone a few minutes a day. I'm not someone who has it attached to the year 24/7 or constantly texting and playing apps. I check for messages from my wife and kids and that's pretty much it. So even if my battery runs low, I still have many hours of use out of it.