iPhone screen dims randomly

I had mine replaced last Friday. The screen dimming issue does happen with this new one, but far less and far less severe. The whole phone seems more responsive, actually. I’ve had some moderate dimming while connected to a 2.4a power source, but it’s msybe happened once for a few minutes since. The phone seems to run cooler.

Maybe I was lucky with my 6 & 7 or didn’t notice it? I just recently noticed it with the X.

It is odd that it affects people differently. For instance mine only dims while using Waze and my X is on the dash. My wife, who uses the 6 will be on the couch reading and hers dims. She will be in the car, reading and it dims. Others have stated just going outside in the direct sunlight causes it to dim immediately.

That’s why I’m not sure if it is a heat issue or software/hardware issue. Unfortunately I don’t think we will ever get to the bottom of this issue.

I tried to create a case in this issue to raise awareness to the engineers but I couldn’t force it to happen or share it while on the phone. I did happen to record it using video the other day so when I go to “replace my iPhone X ” which will not work, I’ll be able to share the video and also send it the engineers. For the first time ever, I noticed it happen on my work iPhone 8 today. 🤔 A funny coincidence, today is also one of the first times I’ve used Waze on that phone....

This has also happened on my 7 plus pretty much after iOS 11. It’s def a software bug (possibly intentional). We’ll see what happens.

(Sorry for the rambling!)

This is also happening to me. Initially I thought I was just imagining things. Then I thought it was google map specific but it also happen in iOS map. Now that people mention about heating, I do notice my phone is quite hot and things are sluggish. I have the otter box commuters case on my iPhone. Outer temperature is about 98 Fahrenheit, I do have AC blast in my car. Glad to know this issue is not just my phone, hopefully the next iOS will fix it. I rely on gps heavily. Restarting phone and enter password due to restart to fix brightness is quite dangerous while driving. [i do have auto brightness disabled under display accomodation]

Anyone experience this issue going no case?

I am having this problem with my iPhone X as well.

I was out in the sunshine this week trying to read a book using the Amazon Kindle app and, while it was bright enough when I began reading, after five minutes or so the screen dimmed, and then it dimmed some more, and then it dimmed some more until I couldn't make out what was on the screen. It definitely did it in increments.

I don't think it has anything to do with the Waze app, (or whatever it's called), I've never heard of it or used it. For me it seems to happen with all apps, including Google Maps etc.

If I restart my iPhone in the usual way it always restarts with a brighter screen, but then begins dimming again.

I have an iPhone X running iOS 11.4. It is in a genuine Apple iPhone X Leather Case, which only covers the body and not the screen. In Settings>Display & Brightness I have True Tone switched on, but Night Shift switched off.

When this problem has occurred I have checked that setting, (with some difficulty because of the dark screen), and the slider has always been fully over to the right, (ie. Maximum brightness), and so it has been impossible to increase brightness.

When indoors, out of direct sunshine, the display behaves perfectly, brightening & dimming as required.

After scanning this thread I've switched off Face ID Attention-Aware features, but I've not used the phone in the sun since then, so I don't know if it has had any effect.

Yes I get this same problem aswell - mainly when I am playing fortnite so it seems that what some of the others have said could be correct as I imagine fortnite is harder for the phone to run that many other everyday tasks - lol brightness just went back up as I was typing this 👍-1F3FD;

An interesting article based on the phone screen dimming due to heat potentially causing damage or app crashing. This is a safeguard.

https://mobileinternist.com/iphone-screen-dims-unexpectedly-explanation

I have iPhone X and I have same issue but only when I’m outside in the sun. By default phone should be getting brighter so you can see it, instead, mine goes darker and darker and then little brighter for a second and then back to super dark to the point where you can barely see anything and it doesn’t change even if you cover the sensors with your hand. It only gets better when you bring inside the house and leave it for a bit alone. I see how people say to turn off auto brightness, but on iPhone X you don’t even have that option under display settings and when you swipe your screen down to adjust brightness there, it’s all the way up to the max, but screen is still dark and dimmed out.

This issue is is due to BAD Engineering that causes the display to dim everytime the CPU heats up:

Started with iPhone 6

Continued with iPhone 7 Plus

And still here in my new $1500 iPhone XS Max

You would think they fixed it on the latest phone, but no..... Apple, you need to get to the bottom of this!

This was happening on my old iPhone X and now I have the new iPhone XS Max. I set this phone up as a brand new phone (Not from Backup) and installed all applications from scratch. No true-tone, no-autodimming enabled and no white point enabled and this still persists. This happens often i notice when the CPU is being taxed. I generally am gaming on the phone playing Battle Bay in particular when this happens. Apple Engineers help!

Same problem here, and now it’s about 7 months talking to apple trying to figure out my problem.

i already changed my screen, and the phone.

nothing change.

so I went the apple headquarters in Cupertino and a employee told me:

-There’s no way to fix that because is a built in feature.

just for the record my settings👇

[Edited by Host]

Like the ms009986 said I already posted the same thing 93 times and guess what, I'll post 93 times if necessary.

Because i spend 7 months trying to figure out with apple a solution for this problem, was a tons of phone calls and a tons of store appointments.

First they changed my screen and nothing, after they give a brand new phone and nothing again, at this point I was VERY UPSET because the reason I decided spend a thousand dollars in a phone was looking for a perfect experience.

So I decide to call one last time and let they know how upset I was and that I demand a phone from apple that don't change the brightness for itself, the senior guy ( after 7 months ) told me that this is a built in feature you can't control and after the iPhone 6 every iPhone has this built in feature, and he did more, he said that all brands has the same built in feature, guess what I upgraded to a android phone ( note 9 ) and the screen is always at the brightness level that I stipulate.

Don't wasted your time and patience with this company they don't deserve it.

Thanks joannatamasm. I set my magnifier to off and it actually worked. I was going to go back in and turn magnifier on and then off again to reset it if it hadn’t worked the first time. Appreciate you sharing. Now to Apple....is there any way to block individuals on this discussion that abuse the service and blow up our notifications because they are angry?

Same issue here, doesn't solve it.