“Is anyone else having these issues? I keep setting my iPhone to brighter and it automatically moves it back down to a lower brightness after updating to iOS 11. Can anyone help me fix this problem soon? Thanks!”
As the issue demonstrated above, many users with the old iPhone devices, like iPhone 6, 6S, 7, 7 Plus have found some problems are occurring on there devices after updating to iOS 11 on the day it was released. The issues are disparate but all related to iOS updating, such as iPhone screen recording not working, iPhone live wallpaper won't display properly or iPhone brightness keeps changing we will discuss in this post. Keep reading to see how to fix iPhone brightness keeps dimming or going up/down by itself in iOS 11.
Based on what we've known, the iPhone brightness keeps changing in iOS 11 is mostly caused by Auto-Brightness feature on iPhone or the iOS bugs problem. Try to fix it with methods below.
If you have enabled auto-brightness on your iPhone in iOS 11, your iPhone will use a light sensor to adjust brightness based on your surroundings, which means the brightness will keep changing by itself. You can disable this ambient-light sensor by:
Going to "Settings" > "Display & Brightness" > find "True Tone" and turn it off.
After you have disabled the light sensor mode, you can reset your iPhone brightness to check your iPhone brightness keeps changing or not. Do it in two ways:
If your iPhone brightness still keeps changing in iOS 11 after you have turn off the True Tone feature, you can try to restart your iPhone to fix the issues caused by running cash, like iPhone notification not working in iOS 11.
Restart iPhone 6/7/8: Press and hold the "Sleep/Wake" button until the red slider shows up, then drag the "slider to power off". After 30 seconds later, press and hold the "Sleep/Wake" button again until the Apple logo appears on your iPhone.
Restart iPhone X: Press and hold both Side button and Volume Down ( or Volume Up) buttons at the same time until you see the slider. Drag the slider to shut down your iPhone X completely. After 30 seconds later, press and hold the "Sleep/Wake" button again until the Apple logo appears on your iPhone.
If your iPhone brightness keeps going up and down or keeps dimming all the way can be solved by using the methods below, you can update to the latest iOS version to troubleshoot if the matter is iOS-related.
Go to "Settings" > "General" > "Software Update" > check whether there is a new version or not. If yes, tap "Download and Install" to start to install the latest iOS 11 version on your iPhone.
The final way deserves to try is to restore your iPhone from a backup. You can restore your iPhone from iCloud backup or restore from iTunes backup. To make sure everything is alright, we suggest you use the latter way. Go to check how to restore iPhone from iTunes backup on another page.
Step 1. Connect your iPhone to your computer running Windows system with a USB cable > Select the "Backup Manager" from the left panel > Select "Backup" to proceed.
Step 2. Tick the box next to "Select All" to back up all files from iPhone to computer > Set the destination on computer > Click on "One-Click Backup" to start the backup process.
Step 3. MobiMover will start immediately to back up iPhone files to your computer without requiring iTunes. Wait patiently until it finishes.
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