Fix: Screen brightness unexpectedly dims on iPhone

It’s easy to overlook certain rad iOS features just because they’re not obvious. Nonetheless, we’re sure that without them, the premium nature of iPhone would fall below the expectations. On the other hand, if you are not informed about those features, they may appear to be a weird system issue or 3rd-party app’s error.

One user on Apple’s community forum experienced something strange in regard to screen brightness and we’re bringing you his/hers experience below:

”I turned on the maximum brightness screen and I turned off the brightness mode but why when I turned on max brightness and I played the game for about 10 minutes then my screen light suddenly darkened To some extent but while the light bar in the control center is still the maximum. After I stop playing the game, the screen light will come back to normal after about 10 minutes! I do not understand what is happening on my device.”

You can find the explanation below.

Why may iPhone dim screen while gaming?

As you can see for yourself, this seems like a strange bug. But just on a first glance. This isn’t the problem but it’s rather a solution for overheating. If you have been using your device for the extended period of time, especially playing a demanding game, the phone will, logically, start to heat up. In order to prevent overheating and possible hardware damage, iOS software regulates certain processes in order to ”cool down” the device.

This is a standard practice, so you have nothing to worry about. Just leave your phone for some time and everything, including the screen brightness, will restore to normal values and activity.

These are some features that will be affected by the changes iOS inflicts in order to prevent the device from overheating:

  • Camera flash will be temporarily disabled.
  • Cellular radio will enter the low-energy state which might affect your signal and Mobile Data.
  • The display will dim or turn black temporarily.
  • If the device is plugged into the wall socket, it will stop charging.

If the temperatures are above the norms, you’ll see the emergency prompt that informs you about the current state. In order to use your device, you’ll need to wait for the cooldown.

How to speed up the cooldown process or even avoid heating?

You can speed up the cooldown by unplugging your device from a charger, avoiding sun exposure and just let it be. On the other hand, if you’re keen to prevent overheating, it’s paramount to use your handset only when it’s not charging. This especially comes into play when is hot outside. In addition, don’t expose it to sun or heat sources for the extended period of time. And, finally, if you run graphically demanding games, make sure to take a break from time to time.

We hope that this was a helpful read. What’s your experience with overheating? Please do share your thoughts in the comments section below.


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April 16, 2020 10:24 pm

Can we escape this provlem (automatically reducing the brightness ) ?
Can we turn off this feature?

May 3, 2020 9:58 am
Reply to  Samvel

If u turn off this smh then ur phone will die for sure :))))

July 15, 2018 7:23 pm

Here’s the funny thing (ha ha): APPLE SUPPORT DOESN’T KNOW ABOUT THIS and went ahead and tried to solve the “hardware priblem” over the phone. Finally, they told me to bring it in for repair or replacement. Idiots.

July 15, 2018 7:19 pm


Satwik Vejandla
Satwik Vejandla
March 11, 2020 2:49 am

the new 11 does this too. 10 or 20 minutes into playing PUB G the display maxes out at 50%. This is such a big design flaw and it’s really frustrating…

Donald James Hubbard
Donald James Hubbard
June 18, 2020 6:47 am

It’s not a design flaw. As stated in the above article, it is intentional so that the phone can cool down. If this feature wasn’t there, your phone may be damaged by the heat.

July 3, 2020 7:16 pm

I’de rather my phone overheat and have to get a new one then interrupt my display during a game. They should have a way to turn this feature off, even if it has to come with a warning that violates warrantee or something.

September 17, 2020 4:37 pm
Reply to  Brock

I have the same problem with my iPhone and my iPad, I’m using outside in 18/ 20 degrees and the brightness keeps going low, so making both unusable, tbo I’m thinking of changing to another brand, Apple are taking the piss.

James Cole
James Cole
September 18, 2019 12:25 am

I think I phone has a design flaw from what I’ve read it was intentional but for someone like myself who has trouble seeing what is on my phone when the phone warms up screen goes dim making it for me almost impossible to see I can’t help that I work in west Texas we’re it’s always hot outside but you need to send a fix for this

July 14, 2018 12:48 pm

You are right, this is a bug ! I loved the brightness of Apple products in the sun. Now this advantage has gone. After a few minutes the iOS device dimms down and the screen becomes unusable in so many situations. Full brightness only works in the dark ! Rudiculous!

Paul Puscizna
Paul Puscizna
April 12, 2020 10:58 pm

I love playing games in the dark
This is stupid

February 7, 2020 7:36 pm

Thanks this was helpful my screen would dim playing my game,
But still dimmed frequent even though the game was closed.
The phone did heat up

Steven Le
Steven Le
September 8, 2020 4:22 am

Turn-off the BACKGROUND Refreshing in the Setting This one making the phone getting hot and Apple lower the brightness in order to prevent the Phone X overheated.

June 26, 2020 8:56 am

If i want to off can i

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