Go into the settings app. Click on "display and brightness" menu. There should be a toggle for auto brightness on/off, as well as a slider for manual control of the backlight.
Go into the settings app. Click on "display and brightness" menu. There should be a toggle for auto brightness on/off, as well as a slider for manual control of the backlight.
I had this same issue on my 6. Very annoying and I could only fix it by going to zoom and hen back to normal. Then it would be bright again. I've decided on getting the 6+ so hope it doesn't have it once it arrives.
Go into the settings app. Click on "display and brightness" menu. There should be a toggle for auto brightness on/off, as well as a slider for manual control of the backlight.