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I had the following situation. In my phone I might accidentally drop the brightness to 0. .When that happened I could not do anything. I had a hard time unlocking my lock-screen using a pin code. I had to use some flashlight to be able to unlock my phone and reset the brightness. Now in order to prevent this in the future I want to set a threshold (lets say 30%) that the brightness will not drop below that threshold. Is that even possible?

Manos Kounelakis
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  • The minimum brightness mode is as far as I know a fixed value that can't be changed on an unrooted device. A too dark brightness is very rare, usually it is the other way around. I would recommend to prepare your device: enable developer options and ADB plus authenticate a PC by connecting it. For entering the pin use a simple USB keyboard that works blind and after unlocking you should be able to set the screen brightness via ADB. – Robert Aug 19 '20 at 20:05
  • Apps like this allow you to set brightness level – beeshyams Aug 20 '20 at 03:01
  • You can use ADB to setup the brightness: adb shell settings put screen_brightness 255 the value can be between 0 and 255. – St0rm Aug 20 '20 at 20:58

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