My device was too bright when I set low screen brightness. To improve it go to:Settings -> Factory (3368 password) -> Backlight Current Adjustment ( 5768 password)My default settings were: Min - 30 / Max - 60Current : Min - 1 / Max - 100* changing those settings can make screen flickering(it happens for EKIY 100% - verified, for IYING 2K you gets really nice brightness during day and very dim brightness during night ) - if need more dark please install (Lower Brightness apk)...Read more