Do you find the automatic brightness and darkening of your iPhone screen annoying? To assist prevent eyestrain and make your screen a little easier to read, your phone can detect how much light is in your surroundings and change the brightness of the display. However, auto-brightness isn’t always a good feature.

The issue can be that, even while you’re in the light, your display automatically dims down. Your phone may be misled into automatically darkening your screen if you’re partly in the shadow, even if it doesn’t have to. It may get challenging to see what’s on your screen as a result. Increasing the brightness by hand

It will just descend once again due to auto-brightness. Although turning off the required settings isn’t always the easiest approach to resolve this problem, it’s an excellent place to start. To assist stop your iPhone from dimming itself, we’ll show you two options you need to turn off. Note that even if you deactivate those two options, your iPhone may still automatically alter its brightness.

You should also read everything we know about the iPhone 15 and the essential information regarding the iOS 17 Beta while you’re here.

Turn off auto-brightness first.
Yes, this may seem a little self-evident, but the first thing you need do is check your settings to make sure automatic brightness is turned off. The feature should go without saying.

Depending on the ambient light, it automatically changes your brightness. You must turn off this function if you want to stop your display from constantly attempting to adapt.

Toggle off Auto-Brightness at the bottom of the page by selecting Accessibility > Display & Text Size in the Settings app. Since auto-brightness is hidden under Accessibility, it’s typical for it to be activated without your knowledge. You would imagine that this option would be found in Display & Brightness.

In iOS, the auto-brightness settings are hidden behind the accessibility settings.
You must turn off another option if your brightness keeps changing on its own.

Additionally, you must disable True Tone.

The True Tone function on iPhone SE (2nd gen) and subsequent models detects the brightness and color temperature of your surroundings and modifies the display to fit. When you need it, True Tone is helpful since it’s gentler on the eyes, which is important if you read on your phone all the time. It also helps display more realistic colors in different lighting conditions.

Once again, you must deactivate the function if you don’t want it, don’t use it, or are just upset that your brightness keeps changing on its own. Toggle off True Tone under the Brightness heading under Display & Brightness in Settings.

Turning off True Tone should stop your iPhone from automatically altering your brightness, provided that auto-brightness is likewise turned off.

iOS’s True Tone setting
Your display may be the problem if Auto-Brightness is turned off and it still adjusts itself.

There is one exception.

Keep your iPhone from overheating.
One of the ways your iPhone protects its internal components is by automatically lowering the screen’s brightness. Your iPhone will automatically alter the display intensity if it is overheating, even if you have both auto-brightness and True Tone turned off.

Apple advises using your iPhone at temperatures between 32 and 95 degrees Fahrenheit (zero to 35 degrees Celsius) and storing it in temperatures between 4 and 113 degrees Fahrenheit (minus 20 to 45 degrees Celsius) to help avoid this. On hot days, there’s a significant risk that your iPhone may overheat and cause your display to dim if you leave it in your vehicle, on the pavement, or even if you attempt to use it near the beach or pool.

Overheating iPhone
If your phone becomes too hot, a warning message will appear.
It’s not only sunny days that induce overheating. Additionally, a malfunctioning battery may cause your iPhone to overheat: To determine if your battery needs to be changed, go to Settings > Battery > Battery Health. Software bugs might be another factor: To address any software flaws and issues, make sure you are always using the most recent version by going to Settings > General > Software Update. iOS’s True Tone option might be the cause if Auto-Brightness is turned off and your screen keeps changing on its own.
There is one exception.

Keep your iPhone from overheating.
One of the ways your iPhone protects its internal components is by automatically lowering the screen’s brightness. Your iPhone will automatically alter the display intensity if it is overheating, even if you have both auto-brightness and True Tone turned off.

Apple advises using your iPhone at temperatures between 32 and 95 degrees Fahrenheit (zero to 35 degrees Celsius) and storing it in temperatures between 4 and 113 degrees Fahrenheit (minus 20 to 45 degrees Celsius) to help avoid this. On hot days, there’s a significant risk that your iPhone may overheat and cause your display to dim if you leave it in your vehicle, on the pavement, or even if you attempt to use it near the beach or pool.

Overheating iPhone
If your phone becomes too hot, a warning message will appear.

overheat: Select Settings > Battery > Battery Health to see whether your battery needs to be replaced. Another cause might be software bugs: Make sure you are always using the most current version of the program by navigating to Settings > General > program Update to fix any bugs and problems. If Auto-Brightness is off and your screen continues to change on its own, it might be due to iOS’s True Tone feature.

One exception exists.

Prevent the overheating of your iPhone.
Your iPhone’s ability to automatically reduce screen brightness is one way it safeguards its internal components. Even if you have both auto-brightness and True Tone switched off, your iPhone will automatically adjust the display brightness if it is overheated.