The iPhone’s automated dimming characteristic is designed to preserve battery life by lowering the display’s brightness after a interval of inactivity. Whereas this characteristic will be useful in some conditions, it will also be irritating if you end up continuously having to regulate the display brightness. Happily, there’s a strategy to disable the automated dimming characteristic and maintain your iPhone’s display vibrant always.
To disable the automated dimming characteristic, go to Settings > Show & Brightness. Underneath the Brightness part, you will note a slider that you should utilize to regulate the display brightness. Beneath the slider, you will note an choice labeled “Auto-Brightness.” Faucet the change subsequent to this feature to show it off.