So today I am going to tell you how you can get virtual auto brightness without ambient light sensor in ANDROID
The app I am going to use is Lux, it is not available in play store just go and download it from Google.
Step1.Open Lux and press the gear icon.
Step2. Then choose Sample collection and select sensors.
Step3. Exit to home screen.
Step4. Use notification icon or Lux widget to get to the Dash board.
Step5. Wait till it refresh and detect the light luminosity(lm).
It will set bright ness according to the surrounding.
And I think that it is more better than any auto brightness phone.
Thanks for reading.
You can thank me in XDA
Device used- S DUOS GT S7562.