Have an iPhone 6, 6 Plus, 6s, 6s Plus that seems to randomly dim by itself? Me too. For some reason a few months ago, my iPhone 6s began to randomly dim its screen/display all by itself. I was so frustrated, and it only got worse as time went on. I tried just about everything that was suggested online and NONE OF IT WORKED!
Lo and behold, after updating to 10.3.1 (and subsequently 10.3.2), my iPhone 6s no longer randomly dims on it’s own! Sad thing is that Apple never owned up to the problem…just simply ignored it and acted as if nothing was wrong with the phone. I was hoping that this problem would be corrected via an update to IOS and luckily it did. Thanks for the heads up Apple..yeah right!