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iPhone 12 screen brightness issue

My iphone 12 pro brightness is inconsistent. Its dims or gets darker screen when its at max and after i sleep my screen and wake it again, it gets much much brighter.

As if it was on 25%. Its seems to me like a lag or something of the sort happens to the screen. Any suggestions?


[Re-Titled by Moderator]

Posted on Nov 10, 2020 1:49 AM

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Posted on Nov 30, 2020 5:17 AM

It s happening to me when I am under the sun for 30-40 minutes. Gets significantly darker without any reason (brightness settings are all max and manual with True Tone disabled). If I go to the brightness menu settings still brightness is at max level but I cannot restore brightness at this level and the screen is significantly darker


313 replies

May 16, 2021 2:03 PM in response to gangstermo

Hmmmm, interesting, well thanks dude, finally I can try to do something about it. I found this on Amazon, I guess we will just have to put this on while flying, it looks like there’s ways to clamp it on while it’s on the DJI remote, hope it at least keeps it cool during flights. I’ll let you know if it works, will reply back soon, thanks

Jul 25, 2021 3:13 PM in response to kaykid

My experience is that EVERY iPhone since at least the 6 will overheat and dim by design. However the 12 series does so MUCH MUCH SOONER.

i wouldn’t worry about the 11 doing that on you. It happens on a hot day especially of certain apps are running and then you take pics etc. if you had the 12 it would have happened event sooner I assure you.

Keep an eye on it but don’t worry too much. It will rarely happen in previous generation phones.


oh today I got this on my 12 at the pool…

Dec 18, 2020 4:02 PM in response to Jessica0515

There is a definite bug with iPhone 12 screen brightness IMO. Has happened multiple times quite randomly that screen suddenly dims to excessive levels and even dragging brightness manually up to max still results in a dull screen. This has happened indoors and outdoors; at normal temperature and heat; and happens suddenly and without any changes in ambient light. So the phone isn't responding to changes in ambient lighting conditions.

Today I corrected it by switch g auto I'm on amd off but I doubt this will be a lasting fix. Apply will need to fix this glitch with an update IMO

Dec 19, 2020 8:17 AM in response to hesham218

same thing here. I just bought a 12 pro. Screen brightness randomly changes brightness. I have switched off any automatic screen adjustment stuff in settings and still happening. Apple, anything? This is a huge problem for me. I do a lot of photo editing on this device (not the best idea...) and now I can’t trust what I’m seeing. Thinking of returning this phone.

Dec 19, 2020 7:03 PM in response to travisfromnewport news

I'm familiar with the iPhones turning dim while overheating, but it's pretty clear when this happens. For me, whenever I was outside in ~90 degree F while doing something intensive on the phone with full brightness, AKA in music with GPS, intensive app game, steaming. I understood the screen went dim because the phone was warm and I was using it more than normal in hot temperatures.


Now with my 12 Pro, after just plugging the phone indoors to charge and starting up a game, the phone instantly went dim as if it were overheating which is strange because the phone wasn't warm; the sun wasn't out nor was I outside to begin with. Brightness slider at max was still really dim, bringing it down makes the screen barely visible. After pressing the sleep button once and waking the phone, the screen was at normal brightness like normal. Maybe the phone is really overheating in just that one moment in some weird programming logic way, or it simply a bug/hardware issue. Maybe I'm unlucky and the other replies are overheating issues, I'm not sure. But it's definitely happened more on the 12 Pro for me compared to my old 5s, 6s, and Xs, not once did those phones get dim unless the phone or the environment were obviously warm. At least, I think it should be looked into.. this thread has a good number of replies compared to what I've read of older phones tbh.

Dec 25, 2020 12:46 PM in response to hesham218

The issue I’m having is similar but different.


When I have the phone at full brightness with no overheating or sun issues,and put the phone in standby sleep and then wake it, the screen is always at 50% brightness. I have battery screen all set not to do this, but Apple insists I brighten the screen each time I wake the device. This is frustrating


I think it’s Apple writing code to do this to protect the future value of the screen when I upgrade. But I’m buying this phone and paying duckets for it.


I don’t like this intrusion and hope it is corrected before I take the complaint higher up

Jan 12, 2021 1:59 PM in response to Paul1Lee

This happened to me as well, thought my phone was defective. I got lucky and was able to see just enough to raise it back up. Of course when I went to speak with the Verizon phone rep (I had just bought the 12 mini) the screen magically was brighter. it seems to only happen in sunlight, get really dark then slowly brighter and after a couple of minutes snap out of it and brighten all the way back up to where it should be...apple needs to fix this now.




[Edited by Moderator]

iPhone 12 screen brightness issue

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