iPhone 12 screen brightness issue

Strange, those settings were the cause!

I've been outside and had no problem before, but after reset of the phone, suddenly, maxed brightness outside was not enough. Disconnecting these features brought all to normal. Is this something I should be contacting apple? Is it a defect? Or this is the same for all iphones 12 max pro?

PS iphone 7 plus IS VERY BRIGHT!

This is correct, I was out yesterday in 95 degree heat, took my phone to a car show, iPhone 12 Pro Max didn’t perform as it should. My phone overheated, picture quality was so dim I ended up taking off my sunglasses to see the screen even more. I had a logo or symbol pop up saying my iPhone is overheating and needs to be cooled down. That’s just a poor build Quality imo. APPLE, MUST FIX ISSUE!!!

I went to apple Genius Bar 3 times 4 th time they replaced my logic board I haven’t tested in sun but my replacement phone even seems much quicker ! Been raining so didn’t get to test in 2 mins of sun my phone would go dim on max brightness it’s very sad :(((

There's a difference between being outside for a while on a sunny day and receiving the message above, which should typically only be seen if the phone has spent several minutes in direct sunlight or if you are running something making heavy use of the processor.

Solved!

I found the setting causing the dimming! It’s under Face ID & passcode.

Attention Aware Features is the culprit! When it detects you looking at the screen or not it adjusts the display! Rude!

My frustration is similar but a bit different to what's been posted already: I've turned off all the settings these posts suggest, but it still the case that the Brightness reverts to the mid-point on the slider after I set it to the max. This is frustrating when I'm wearing sunglasses in the bright sun, trying to see the screen to take a decent photo. I might take one photo but then the brightness dims down again, forcing me to constantly reset the brightness before each shot. NOT GOOD!!!

Everyone looking for a setting when it is simply a hardware defect of overheating! The oled not lcd panel with CPU cause a overheat in seconds wren over 80 degrees. No settings will save you put in front of the AC keep out of sun and will be fine . Go in sun for 1 min and you have a 1200 dollar overheating brick !!!! APPLE needs to help us !!!!! I got a replacement and it’s overheating in sun in 2 mins , my 11 was great it was lcd panel !!!!!!

AGREED KAKID! Only now it is 19 pages of comments. I just wish that they would allow a free "downgrade" from 12 to an earlier model (for free.) This phone is impossible to use at all a lot of the time and there are NO answers or they would have already appeared.

I also wish folks would stop rating bad non-answers as HELPFUL suggesting as if there was a resolution which there is NOT. So many have come in after many pages and suggest disabling auto features as if the hundreds of us have not already tried that. We have, and that did not solve anything. No settings or new phones have fixed this horrible screen dimming issue, It continues to happen under a variety of conditions for us. Hot, cold, sunny, dim, indoors, outdoors, warm, hot, cool temperatures. Using no app, this app, or that app.

My final wish is to subscribe to this thread only when it reaches a resolved status. Not possible, right?

I had all of those turned off. Doesn’t fix the issue. Reduce Transparency was still on so I turned that off and will see if the issue continues. Thanks

Indeed . Verified 100 mess ago

Return ii or replace it till you get one that is working ok !!

Have you tried carrying an umbrella, ice pack, cooler and portable fan as part of your accessories? Not a permeant fix but im sure it could help

Nope. That’s a different issue.

As soon as you get some sun to hit on that thing it will heat up so quickly and dim the screen to protect itself.