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SaqibJaved198
User level: Level 1 (4 points)

iPhone 16 Pro Auto-Brightness option missing and not working

Auto-Brightness option missing and not working on iPhone 16 Pro (iOS 27.2 / 27.2.1)


I’m having an issue with Auto-Brightness on my iPhone 16 Pro.


I’ve tested this on both iOS 27.2 and 27.2.1, but the Auto-Brightness option is completely missing from:


Settings → Accessibility → Display & Text Size.


I’ve also tried enabling it through Siri, and even when Siri confirms that it’s enabled, Auto-Brightness still doesn’t work.


What’s confusing is that the sensors seem to be functioning:

  • When I receive a call and put the phone against my ear, the screen turns off normally.
  • When I completely cover the sensor area with my hand, the screen brightness drops to the minimum.
  • However, when I remove my hand and expose the sensor to bright light, the brightness doesn’t automatically increase as expected.
  • So, the screen responds when the sensor is covered, but Auto-Brightness doesn’t seem to adjust properly according to the surrounding light conditions.


I’ve tried checking different settings, but the Auto-Brightness option is still missing.


My questions:

  1. Has anyone else experienced this issue on an iPhone 16 Pro?
  2. Could this be an iOS software bug, or is there a possibility of an ambient light sensor issue?
  3. Is there any way to restore the missing Auto-Brightness option without resetting the entire iPhone?


I’d appreciate any suggestions or solutions. Thanks!

Posted on Nov 10, 2026 2:19 AM

3 replies

SravanKrA
User level: Level 10 (454,138 points)

Nov 10, 2026 5:36 AM in response to SaqibJaved198

SaqibJaved198 wrote:
2. Could this be an iOS software bug, or is there a possibility of an ambient light sensor issue?

Not every issue an individual encounters on their device can be attributed to an iOS update. iOS 27 or later may have coincided with what you are experiencing, but that does not mean the issue was triggered by iOS. Coincidence in timing is not, by itself, evidence of causation.


If the update itself were the root cause, then every device running that same version of iOS would exhibit the identical problem. In such a scenario, the forums would be flooded with countless posts reporting the same malfunction, creating an unmistakable wave of complaints that no one could possibly overlook.


The absence of such widespread reports strongly indicates that the issue is not a general, system-wide problem with iOS 27 or later, but rather something specific to the individual device, its configuration, installed apps, settings, hardware, or another interacting factor.


In short: iOS 27 or later may be a coincidence in timing, but there is no basis to conclude that iOS itself triggered the problem simply because the issue appeared after the update.




See what each update does: About iOS 27 Updates, About iOS 26 Updates, About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...





SaqibJaved198 Author
User level: Level 1 (4 points)

Nov 10, 2026 6:40 AM in response to SravanKrA

I understand that the issue may not necessarily be caused by the iOS update.


However, my main concern is that the Auto-Brightness option is completely missing from Accessibility settings, and enabling it through Siri doesn’t make any difference.


I’ve also checked the sensor functionality. The screen turns off normally during calls when I bring the phone close to my ear. When I completely cover the sensor area with my hand, the screen brightness drops to minimum. However, when I uncover it in a brightly lit environment, the brightness doesn’t increase automatically.


I’m trying to understand whether this could be an ambient light sensor issue, a software/configuration problem, or something else.


Has anyone experienced the same issue on an iPhone 16 Pro?

SravanKrA
User level: Level 10 (454,138 points)

Nov 10, 2026 5:34 AM in response to SaqibJaved198

This is what I see on iOS 27.2


Originally posted at discussions.apple.com/thread/256391813