The reason your phone keeps dimming even with auto-brightness off

Summary
If your iPhone or Android phone's screen keeps darkening when you don't want it to, there are several possible explanations.
Description from Engadget.
Who is covering this
-
The reason your phone keeps dimming even with auto-brightness off
If your iPhone or Android phone's screen keeps darkening when you don't want it to, there are several possible explanations.
Comments
Comments need JavaScript.