Face ID may not work with a mask due to specific requirements and setup issues. 1. Masks must leave the upper face, especially eyes and eyebrows, visible; dark, reflective, or thickly woven masks may not work. 2. Users must enroll Face ID specifically with a mask by going to Settings > Face ID & Passcode > “Set Up Face ID with Mask.” 3. Only iPhones with TrueDepth cameras (iPhone 12 and newer) support this feature, and the device must run iOS 15.4 or later. 4. Environmental factors like lighting, sunglasses, and camera positioning also affect performance. Resetting Face ID can help resolve persistent issues.
Apple introduced the ability to use Face ID with a mask starting with iOS 15.4, but if you're having trouble getting it to work, there are several reasons why your iPhone’s Face ID might not recognize you when you’re wearing one.

Face ID with mask has specific requirements
Not all masks work equally well with Face ID. Apple designed this feature to work best when the top portion of your face — especially around your eyes and eyebrows — is clearly visible. If your mask covers too much of your nose or goes high enough to obscure part of your cheeks, Face ID may struggle to match your facial features accurately.
Also, Face ID won’t work with certain types of masks, like:

- Masks that are too dark or reflective
- Masks made of materials that obscure facial contours (e.g., thick knits)
- Masks worn loosely or unevenly
Try switching to a lighter-colored, well-fitted mask to see if that helps.
You didn’t enroll Face ID properly with a mask
To enable Face ID with a mask, you need to re-enroll your face specifically for this scenario. This process captures more data about the upper half of your face so the system can recognize you even when the lower half is covered.

Here’s how to set it up:
- Go to Settings > Face ID & Passcode
- Tap “Set Up Face ID with Mask”
- Follow the on-screen instructions to scan your face while wearing a mask
If you skipped this step or didn’t complete it carefully, Face ID won’t be able to match your face reliably later.
Hardware and software limitations matter
Face ID with mask requires an iPhone with a TrueDepth camera system — that means iPhone 12 models and newer. Older iPhones like the iPhone 11 don’t support this feature at all, even with the latest iOS updates.
Also, make sure your iPhone is updated to at least iOS 15.4 or later. Without that version installed, the mask recognition feature simply won’t be available.
Another thing to consider: Face ID performance can be affected by poor lighting, sunglasses (especially those with infrared-blocking lenses), or if your face isn’t centered in the camera frame.
If you’ve checked these points and still have issues, try resetting Face ID entirely and setting it up again — both regular and mask-enabled versions. Sometimes a fresh setup clears out glitches that prevent proper recognition.
That’s about it — Face ID with a mask works pretty well most of the time, but it’s sensitive to how you set it up and what kind of mask you use.
The above is the detailed content of Why is my iPhone's Face ID not working with a mask. For more information, please follow other related articles on the PHP Chinese website!

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