Face ID not working after using Guided access
After iOS26 update, face id is not working after using guided access for some time. Face id will start working again after restarting my iPhone. Anyone facing same issue?
iPhone 16 Pro, iOS 26
After iOS26 update, face id is not working after using guided access for some time. Face id will start working again after restarting my iPhone. Anyone facing same issue?
iPhone 16 Pro, iOS 26
You may try some of these steps, please check after each step...

If none of the above steps resolve the issue, it is recommended to reach out to Apple Support or visit an authorized service center for further assistance. They can provide specific guidance based on your device model and iOS version.
Face ID issues are not always the iOS update's fault! Many things can cause phone problems. If you tell people you think it's an iOS update, it might make it harder to fix or find a solution for the real issue.

Remember, the right question often leads to the solution!

Was/Is your device Jailbroken? If that's the situation, please be informed that attributing the issues to iOS updates may not be accurate.

iOS updates aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. The majority of the issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.
Kindly consider checking your settings and addressing any device issues before attributing the issue to external factors. This could be a pure coincidence that the iOS update affected the iPhone functions.
Before initiating a standard iOS update, it's advisable to create a backup. Have you completed this step? If yes, proceed with the restoration from the backup.

See what each update does: OS — iOS 26, 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...
The term used by you, "Face ID not working," is purely coincidental, and it surely is not iOS 26 or higher because...
I conducted a thorough search of this forum using the term 'Face ID after iOS Update' and uncovered numerous posts detailing similar issues across various iOS updates. This suggests that iOS updates may not consistently be the root cause. Below are a handful of examples extracted from the search results:
Reports of Face ID appear across all models and iOS versions in this forum, suggesting the issue is device-specific rather than tied to any particular iOS version or model.

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Clean iPhone immediately if it comes in contact with anything that may cause stains, or other damage—for example, dirt or sand, ink, makeup, soap
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Guided Access limits your device to a single app and lets you control which features are available. You can turn on Guided Access when you let a child use your ...Read more
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Face ID not working after using Guided access