How to Fix iPhone 17 Face ID Not Working After iOS 26.3 Update

iPhone 17 Face ID Not Working After iOS 26.3 Update is usually caused by a camera service glitch, changed Face ID settings, or temporary sensor problems triggered by the update.

For related help, also see How to Fix iPhone 17 Black Screen After iOS 26.3 Update, How to Fix iPhone 17 Mail App Not Working After iOS 26.3 Update, How to Fix iPhone 17 CarPlay Not Working After iOS 26.3 Update, and the iPhone 17 hub.

Method 1: Restart the iPhone 17

A clean reboot can restore Face ID services after a bad update install.

1. Restart the iPhone normally.
2. Unlock it with your passcode once.
3. Test Face ID again from the lock screen.

Method 2: Check if Face ID is enabled for unlock and apps

An update can disable some Face ID toggles or require you to confirm them again.

1. Open Settings > Face ID & Passcode.
2. Make sure iPhone Unlock and the needed app options are enabled.
3. Test again in good lighting.

Method 3: Inspect the TrueDepth area for obstruction

A dirty camera area or thick protector can block Face ID scanning.

1. Clean the front camera area gently.
2. Remove any screen protector that covers the sensor region poorly.
3. Hold the phone at normal unlocking distance and retest.

Method 4: Reset Face ID and set it up again

Rebuilding the biometric profile often fixes update-related Face ID errors.

1. Open Settings > Face ID & Passcode.
2. Tap Reset Face ID.
3. Set up Face ID again from scratch.

Method 5: Turn off attention features temporarily

Attention-aware settings can block unlocking if the sensor is acting too strictly after an update.

1. Go to Settings > Face ID & Passcode.
2. Turn off Require Attention for Face ID temporarily.
3. Test unlocking again.

Method 6: Install the latest iOS patch

Apple often fixes biometric bugs in the next small update.

1. Open Settings > General > Software Update.
2. Install any newer build available.
3. Retest Face ID after updating.

Method 7: Reset all settings if Face ID broke right after the update

A settings reset can repair deeper configuration problems without deleting your personal data.

1. Open Settings > General > Transfer or Reset iPhone > Reset.
2. Tap Reset All Settings.
3. Set Face ID up again afterward.

If the problem continues after all of the steps above, visit the main iPhone 17 page for more troubleshooting guides.