How do I use Auto Brightness?
What is Auto Brightness?
When Auto Brightness is on, the screen brightness will be changed automatically based on the
surrounding. You can still control the brightness by using the slider (This may vary by carrier).
How to set up
Go to Settings ▶ Display ▶ Brightness ▶ Check the box next to Auto.
You can also turn on Auto Brightness on the Quick Menu.
Illumination sensor will be activated when the Auto Brightness is on.