Face ID with Mask: How It Works & How to Set It Up

Face ID with a mask is possible on iPhones running iOS 15.4 or later, but only on iPhone 12 and newer models. You can enable the “Face ID with a Mask” option in Settings, which lets the phone recognize your face even when your nose and mouth are covered, though it requires an Apple Watch for the default unlock method.

Background: Why Face ID Struggled with Masks

When Face ID launched in 2017 with the iPhone X, it relied on a TrueDepth camera projecting over 30,000 invisible dots to map your face. The system was designed to work with your full face visible, including your nose and mouth. When mask mandates became common in 2020, users found that Face ID simply wouldn’t unlock their phones. Apple’s initial workaround was to require a passcode or an Apple Watch, but that only worked for unlocking, not for Apple Pay or password autofill.

The underlying issue is that Face ID’s neural network was trained on full-face data. A mask hides key facial landmarks, reducing the confidence score below the security threshold. Apple’s solution in iOS 15.4 was to retrain the model to focus on the periocular region—the area around your eyes—which remains visible even with a mask.

How Face ID with Mask Works

The feature works by scanning the unique features around your eyes, including the shape of your eye sockets, the distance between your eyes, and the contour of your brow. When you enable it, the iPhone captures additional face-matching data specifically for masked recognition. This data is stored in the Secure Enclave, the same encrypted chip that protects your regular Face ID data.

Here’s what happens when you try to unlock with a mask:

• The TrueDepth camera captures an infrared image of your upper face.
• The A-series chip compares this against the stored periocular data.
• If the match is above the security threshold, the phone unlocks.
• If you’re wearing an Apple Watch, it provides an additional unlock signal, but this is optional.

Without an Apple Watch, you can still use Face ID with a mask, but the accuracy is slightly lower. Apple recommends setting up an alternate appearance without glasses or with different glasses for better performance.

How to Enable Face ID with Mask

Enabling the feature is straightforward, but you need to meet the hardware and software requirements first. Here are the steps:

1. Go to Settings > Face ID & Passcode and enter your passcode.
2. Toggle on Face ID with a Mask.
3. If you have an Apple Watch, toggle on Unlock with Apple Watch (optional but recommended).
4. Follow the on-screen prompts to re-scan your face. The scan is similar to the initial Face ID setup, but it captures additional data around your eyes.
5. If you wear glasses, you can add an alternate appearance to improve recognition.

Note that this feature is not available on iPhone 11 or earlier. Apple’s hardware requirement is the A12 Bionic chip or later, but in practice, only iPhone 12 and newer models support it. If you don’t see the toggle, your device likely doesn’t meet the requirement.

Common Problems and Fixes

Users report several issues with Face ID with a mask. Here are the most common ones and how to resolve them:

• “Face ID with a Mask” toggle is greyed out: This means your iPhone model doesn’t support it. Check if you have iPhone 12 or later.
• It doesn’t work with sunglasses: The feature only works with clear glasses or no glasses. For sunglasses, you’ll need to add an alternate appearance.
• It fails when the mask is too high: If the mask covers your eyes, Face ID can’t see enough of your face. Pull the mask down slightly or use a passcode.
• It works but is slower: Masked recognition is less accurate, so the phone may take a second longer. This is normal.

If you’re still having trouble, try resetting Face ID entirely and setting it up again. Make sure your face is well-lit and the camera lens is clean.

Face ID with Mask vs. Regular Face ID: Accuracy and Security

Apple states that the probability of a false match with Face ID is 1 in 1,000,000 with regular Face ID. With a mask, that probability increases slightly, but Apple hasn’t published an exact figure. The trade-off is that masked recognition uses only the upper half of your face, so there’s less data to compare. However, the Secure Enclave still encrypts all biometric data, and the feature doesn’t lower the security threshold—it simply uses a different set of features.

In practice, this means that identical twins or close family members might have a slightly higher chance of unlocking your phone when you’re wearing a mask. For most users, this risk is negligible, but if you’re concerned about security, you can disable the feature and rely on a passcode or Apple Watch.

Alternatives to Face ID with Mask

If you don’t have a compatible iPhone, or if the feature isn’t working well for you, there are alternatives:

• Apple Watch: If you have an Apple Watch, you can set it to unlock your iPhone when you’re wearing a mask, even without the Face ID with Mask feature. This works on iPhone X and later.
• Passcode: The most reliable fallback. You can quickly enter your passcode after a failed Face ID attempt.
• Touch ID: If you have an iPhone SE (2nd or 3rd generation), you already have Touch ID, which works with masks.
• Android Face Unlock: Some Android phones offer face unlock that works with masks, but security varies widely. Many use 2D camera data and are less secure than Face ID.

For Android users, the most secure option is an in-display fingerprint sensor, which is unaffected by masks.

Frequently Asked Questions

Does Face ID with Mask work with Apple Pay?

Yes, but only if you have an Apple Watch. Without an Apple Watch, Face ID with Mask cannot be used for Apple Pay or password autofill. You’ll need to enter your passcode or double-click the side button and authenticate manually.

Can I use Face ID with Mask if I wear glasses?

Yes, but you may need to set up an alternate appearance. Go to Settings > Face ID & Passcode > Set Up an Alternate Appearance, and scan your face while wearing the glasses you typically use. This works for clear glasses, but not for sunglasses.

Why is my iPhone not showing the “Face ID with a Mask” option?

Your iPhone must be running iOS 15.4 or later and be an iPhone 12, iPhone 13, iPhone 14, or iPhone 15 series model. If you have an older model, the option won’t appear. Also, make sure your region supports it—the feature is available globally, but some enterprise configurations may disable it.

Is Face ID with Mask less secure?

Apple hasn’t disclosed a specific false-match rate for masked recognition, but it’s known to be slightly less accurate than full-face recognition. The system still uses the same Secure Enclave and doesn’t lower the security threshold; it just uses fewer facial features. For most users, the difference is negligible.

Can I use Face ID with a mask and sunglasses together?

No, not reliably. The feature requires your eyes to be visible, and most sunglasses block infrared light. You can try adding an alternate appearance with sunglasses, but it often fails. Apple recommends using clear glasses or removing sunglasses for authentication.

Does Face ID with Mask work with all types of masks?

The feature works with most masks that leave your eyes and brow area visible, including surgical masks, N95 masks, and cloth masks. However, if the mask covers your eyes or is too high, Face ID won’t work. It also doesn’t work with full-face helmets or balaclavas that cover the eye area.

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