Android devices come with a built-in brightness control, but it can be difficult to get it to work properly. Here are some tips to help you lock the brightness on your Android device:
- Make sure your device is turned off and unplugged.
- Open the Settings app and scroll down to the bottom of the screen.
- Under “Device,” find “Brightness.”
- Toggle the “On” checkbox and press OK.
- Close the Settings app and plug in your device again.