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Agent Meister from the Geek Squad spoke to Bill about Want Your iPhone's Screen Brightness to Stop Changing Automatically? Do This
Topic: Want Your iPhone's Screen Brightness to Stop Changing Automatically? Do This
Are you annoyed by how your iPhone screen automatically gets brighter or darker? Your phone can sense the amount of light in your environment and adjust the display brightness, helping to combat eyestrain and make your screen a bit easier to see. But sometimes, auto-brightness is a less-than-useful feature.
If auto-brightness feels more annoying than helpful, you can try turning off these iPhone settings.
First, disable auto-brightness
In the Settings application, go to Accessibility > Display & Text Size and toggle off Auto-Brightness at the bottom of the page.
You would think that this setting would exist in Display & Brightness, so it's not uncommon that auto-brightness would be enabled without you knowing, since it's tucked away in Accessibility.
If your brightness continues to automatically adjust, there's another setting you need to disable.
You also need to turn off True Tone
If you have an iPhone SE (2nd gen) and later, the True Tone feature measures the color temperature and brightness in your environment and then adjusts its display to match it. True Tone is useful when you want it -- it not only helps show more accurate colors across various lighting situations, but it's also easier on the eyes, which you need if you're constantly reading on your phone.
Again, if you don't care about the feature, don't use it or are simply annoyed that your brightness continues to automatically adjust, you need to disable it. In Settings, go to Display & Brightness and toggle off True Tone under the Brightness header. As long as auto-brightness is also disabled, turning True Tone off should prevent your iPhone from automatically adjusting your brightness.
One exception applies.
Don't let your iPhone overheat
Your iPhone has several ways of protecting its internal components, and that includes automatically dimming your display. Even if you have both auto-brightness and True Tone turned off, if your iPhone is overheating, it will automatically adjust the display intensity.