Chosen Solution
When I replaced my phone yesterday with an oem screen I realize that the light sensor didn’t work anymore. The auto brightness adjustment in my setting is on and I’ve tried to pin my phone to a light bulb, nothing. Also my flex cables and everything are in place perfectly and screwed in right. Then I did the research and found out that I was missing this rectangular shaped white film that was supposed to be in front of the light sensor. I just wanna know if that is what is causing the problem or maybe it’s a defective sensor. If it is the white film, where can I buy them?
If you still have your old screen, installing it on your iPhone together with the front cam flex. Home button doesn’t have to be transfered for the phone to function. If it does work, you’ll know that the problem was the missing film. If not, your front camera flex might’ve been damaged while removing it. The sensor is not attached very tightly so it can break off of the cable quite easily.
Phone may not boot and the screen may not even work without the home button connected. Are you 100% clear that it is the light sensor not working or the proximity sensor? I have never seen that white film on any of the screens I have replaced. Try this app to test which sensors are working. I am not sure, but the camera may be the one that is used for the light sensor. The app is free and brilliant. https://itunes.apple.com/gb/app/testm-ch…
