iPhone 12 pro max keeps dimming

I have the iPhone 12 Pro Max and it constantly dims. I made sure the Automatic button was off, it still dims. I went to answer the phone and it had dimmed itself down to an almost completely dark screen. I am constantly having to reset the brightness back to where I can see the screen. Any "bright" ideas?

iPhone 12 Pro Max, iOS 14

Posted on Nov 24, 2020 8:04 PM

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Question marked as Top-ranking reply

Posted on Mar 31, 2022 12:38 AM

SOLVED - iPhone 12 Max Pro Dimming.


A non-apple case causes it to overheat!


My iPhone was fine for two years and I switched from the Apple purchased case that I bought at the Apple Store for a non-Apple case to enjoy a new color. Didn’t think about it but started having problems with my phone dimming.


It was constant if I was googling or reading texts etc it would toggle up and toggle down from bright to dim so I could barely read it. It was ridiculous.


Tried everything the Internet suggested. Turning it off helped but that was only because it was cooling it off. It didn’t solve it. Changing any and all settings did absolutely nothing.


Read a post that mentioned they thought it was an overheating issue. Remembered that I had just purchased a new case before this started. Put back on my Apple purchased case. Voila. No issue for a whole month. SOLVED

396 replies

Apr 15, 2021 11:04 AM in response to 12pmbrightness

Please point out where the auto-dim is.... like i have been saying, there is only ONE auto brightness setting and it is not in here, its is in text and display... and that is off. This is not the issue!! The screen brightness still displays a 100% even when the screen is dimming due to heat! Please stop with these Solutions that don’t work and are irrelevant to the issue

Apr 19, 2021 12:28 PM in response to rjm4261

This is happening to me too in sun even though phone is very cool to the touch. Restart resolves the issue temporarily, but it will come back a few days later. Very disruptive/dangerous when using the phone to navigate an unfamiliar area in the car. I never had this issue for years with an XS max. All autobrightness/accessibility features are disabled per recommendations.


Apple? Fix? Is this a malfuntioning hardware temp sensor or a software issue?

Apr 23, 2021 9:55 AM in response to through_the_phone_lenz

Lol.. I’m tempted to suggest you go into Accessibility, Display & Text, scroll down and turn off auto-brightness. 😂 People are killing me... Read the entire conversation before replying with a suggestion that’s been suggested numerous times.


I have the same issue with a brand new 12 Pro Max. Usually does it while I’m playing a game but not exclusively. No amount of setting adjustments or hard resets fixes the issue. I could replace the phone but my guess is it’ll do the same thing. How about some help Apple? 🙄

Apr 25, 2021 6:20 AM in response to rjm4261

I had to save and scrape all my cash together for months to get my iPhone X! Now that it’s here I’ve turned off auto brightness in both places in settings, and tru-tone as well, but the screen gets **** DARK when I’m using it. The top 50% of the brightness slider in Control Center doesn’t seem to affect brightness at all, it can be up all the way or at 50%- same brightness. Wtf!?! If it’s a heating issue, Apple should notify us so we can stop looking for a solution. Otherwise I’m going to be racking my brain looking for a fix to my phone going blind ten times a day!

May 5, 2021 4:57 PM in response to Krypto909

I have to take mine to the Apple Store and jump through the hoops. Probably get a new one that does the same thing.


If Apple acknowledges there’s a dimming issue then they’ll have to address it. So their policy is to ignore the problem.


Second time I’ve posted this reply. They proved my point.. lol


We removed your post "iPhone 12 pro max keeps dimming" because it was nontechnical or off-topic. We understand wanting to share experiences, but these forums are meant for technical questions that can be answered by the community


May 7, 2021 4:27 AM in response to rjm4261

My 3 month iPhone 12 mini has literally just started doing this. Taking the brightness down to practically zero, where I actually couldn’t see the screen. This is definitely a new issue and Apple need to recognise it. The new series of 12’s whether it be mini, pro, max etc are terrible and plagued with problems. However Apple won’t recognise any of anyone’s comments! I am an Apple lover, watch, MacBook, phone, pad and this has got to be THE worse product line they’ve ever launched!

May 8, 2021 8:45 AM in response to fdojgnn

This guy knows! Literally had every single comment of mine erased! Scummy support from apple regarding this! And yes this is a user to user chat, but apple are more than able to respond on THEIR discussion site! I left apple after their touch disease issue on the 6 range and i will leave again due to this issue, i stand by saying, Huawei have made the absolute best phones to date!

i only wish i could leave this discussion too!

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iPhone 12 pro max keeps dimming

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