For iPhone users, the issue of changing brightness can be a frustrating experience. This issue is usually caused by the Auto Brightness feature, which adjusts the display based on the environment.
To resolve this issue, it is important to take a number of steps:
- Disable Auto Brightness and Night Shift in the Accessibility section of Settings.
- Disable True Tone.
- Restart the device.

It is also important to ensure the device has the latest iOS version installed.
This article provides an overview of the possible reasons and solutions for this issue.
Table of Contents
Reasons and Solutions
Auto Brightness, Night Shift, True Tone, Low Power Mode, and updating the iOS are a few of the reasons and solutions for the iPhone brightness issue mentioned in the pre-existing knowledge.
Auto Brightness is a feature that adjusts the brightness of the iPhone based on the environment, preventing users from being blinded.
Night Shift is another feature that may be enabled without being aware, and should be disabled if it is enabled.
True Tone is another feature that should be disabled, as it adjusts the display of the iPhone based on the surroundings.
Low Power Mode can also be a factor, as it reduces brightness to prolong battery life.
Lastly, updating the iOS version may be necessary to resolve the issue.
Each of these potential solutions should be considered when dealing with the iPhone brightness problem.
Disable Auto Brightness
To resolve the issue of the display’s brightness fluctuating, you can disable the feature of automatically adjusting the display according to the surrounding environment. Here’s how:
- Open the Settings on your device.
- Tap on Accessibility.
- Select Display Text.
- Disable auto brightness by clicking on the green slider.
Checking the Night Shift setting is also important, as it may be turned on without your knowledge. Follow these steps:
- Go to Settings.
- Select Display & Brightness.
- Check if the Night Shift mode is set to Off. If it is, no further adjustments are needed.
- If Night Shift is enabled, disable it manually.
The True Tone option can also affect screen brightness. Here’s how you can disable it:
- Open the Settings on your device.
- Go to Display & Brightness.
- Look for the True Tone option.
- Disable True Tone to prevent it from adapting the display based on the surrounding environment.
Disabling these features should help resolve the brightness issue.
Restart iPhone

Restarting the device may aid in resolving the issue of fluctuating display brightness. A restart can be useful in troubleshooting technical issues, as it forces the system to reload itself and can potentially eliminate any glitches.
To restart an iPhone, one should simultaneously press the side button and one of the volume buttons. This will bring up the power slider, allowing the user to shut off the device.
After waiting for a few moments, the device can be powered back on, and the system should be reset. Although restarting an iPhone does not guarantee that the display brightness will be stabilized, it can help to identify any existing technical issues.
If the problem still persists after restarting, further assistance may be needed.
Frequently Asked Questions [FAQs]
How do I adjust the brightness of my iPhone manually?
To adjust the brightness of an iPhone manually, open the Settings app, select Display & Brightness, and adjust the slider to the desired brightness level.
Is there a way to adjust Auto Brightness settings?
Auto Brightness settings can be adjusted through the Accessibility settings in the Display Text tab. Disabling Auto Brightness can help prevent the screen from randomly changing brightness levels.
Does updating my iPhone software fix the brightness problem?
Updating iPhone software may help fix brightness issues, as the latest version may contain bug fixes and improved features. It is recommended to check for updates and download them when available.
Is there a way to adjust the brightness of the iPhone without using the Settings app?
Yes, the brightness of an iPhone can be adjusted without using the Settings app. For instance, users can quickly adjust the brightness of the iPhone’s screen using the Control Center, which can be accessed by swiping up from the bottom of the display.
Does Low Power Mode affect the brightness of the iPhone?
Yes, Low Power mode can affect the brightness of an iPhone. It prolongs battery life by reducing the brightness of the device. It can be disabled in the Battery section of the Settings app.
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