How to Fix Face ID When It Fails on iPhone 18 Pro

Face ID on the iPhone 18 Pro can stop working for a variety of reasons, from a smudged camera lens to a software glitch or a hardware issue. This guide walks you through the most effective fixes, from simple cleaning to resetting your Face ID and, if needed, contacting Apple Support. No special tools are required, and most steps take less than a minute.

What You’ll Need

A soft, lint-free cloth (like the one used for glasses or camera lenses)
Your iPhone 18 Pro
Your passcode (you’ll need it to reset Face ID)
A stable Wi-Fi or cellular connection (for software updates and restore)

Step-by-Step

Clean the TrueDepth camera and sensors. The most common cause of Face ID failure is a dirty or partially blocked camera. Use a soft, lint-free cloth to gently wipe the entire top area of the phone, including the notch or Dynamic Island area where the TrueDepth camera sits. Avoid using any abrasive materials or liquids. If you have a screen protector, make sure it isn’t covering the sensors.
Check for obstructions. Remove any case, screen protector, or magnetic accessory (like a car mount or magnetic wallet) that might be covering the TrueDepth camera or the sensors. Even a thin film can interfere with the infrared projection.
Make sure your face is positioned correctly. Hold the iPhone 18 Pro about 10–20 inches (25–50 cm) from your face, with your eyes open and looking at the screen. Ensure the camera has a clear view of your eyes, nose, and mouth. If you wear a mask, you may need to set up Face ID with a mask (see Tips) or use your passcode.
Restart your iPhone. A simple restart can clear temporary software glitches. Press and hold the side button and either volume button until the power off slider appears. Drag the slider, wait 30 seconds, then press and hold the side button again until the Apple logo appears.
Update iOS. Go to Settings > General > Software Update. If an update is available, tap Download and Install. Apple regularly fixes Face ID bugs in iOS updates.
Reset Face ID. Go to Settings > Face ID & Passcode, enter your passcode, then tap Reset Face ID. After resetting, tap Set Up Face ID and follow the on-screen instructions. Make sure you’re in a well-lit room and hold the phone as directed.
Set up an alternate appearance (if needed). If your look has changed significantly (e.g., grew a beard, started wearing glasses), you can add an alternate appearance. Go to Settings > Face ID & Passcode > Set Up an Alternate Appearance and scan your face again.
Check for hardware damage. If Face ID still fails after all the above, there may be a hardware issue. Look for any cracks, dents, or water damage near the TrueDepth camera. If you see any, or if the phone has been dropped recently, contact Apple Support.
Restore your iPhone as a last resort. If nothing else works, back up your iPhone, then go to Settings > General > Transfer or Reset iPhone > Erase All Content and Settings. After erasing, restore from your backup. This clears any deep software corruption.

Common Mistakes

Using harsh cleaners or paper towels. These can scratch the lens or leave residue. Use only a soft, lint-free cloth.
Ignoring the screen protector. Many screen protectors have a cutout for the TrueDepth camera, but some cheap ones don’t. If your protector covers the sensors, remove it.
Holding the phone too close or too far. Face ID works best at a specific distance. If you hold it too close, the camera can’t see your whole face.
Not updating iOS. Skipping updates can leave known Face ID bugs unfixed.
Assuming hardware failure too quickly. Most Face ID issues are software or cleanliness related. Exhaust all software fixes before seeking repairs.

Tips

Set up Face ID with a mask. On iPhone 18 Pro, you can use Face ID while wearing a mask. Go to Settings > Face ID & Passcode and enable Face ID with a Mask. This works with most masks, but not sunglasses.
Use an alternate appearance for different looks. If you wear glasses, hats, or makeup that changes your appearance, set up an alternate appearance to improve recognition.
Keep the camera area clean. Make it a habit to wipe the top of your phone occasionally, especially if you use it in dusty environments.
Restart your phone weekly. A quick restart can prevent many minor glitches, including Face ID issues.
Check for iOS beta versions. If you’re on a beta version, it may have bugs. Consider reverting to a stable release.

Troubleshooting

If Face ID still doesn’t work after following all the steps, try these additional checks:

Check for a hardware fault. Go to Settings > Face ID & Passcode. If you see a message like “Face ID has been disabled” or “TrueDepth camera requires service,” it’s a hardware issue. Contact Apple Support.
Try a different environment. Face ID works in low light, but extremely bright sunlight or complete darkness can cause issues. Move to a spot with moderate lighting.
Check for Face ID restrictions. In Settings > Screen Time > Content & Privacy Restrictions, make sure Face ID isn’t blocked. If it’s restricted, you’ll see a message when trying to use it.
Contact Apple Support. If none of the above works, there may be a hardware failure. Apple can run diagnostic tests and, if needed, repair the TrueDepth camera. This is covered under warranty if the issue isn’t due to accidental damage.

Frequently Asked Questions

Why does Face ID stop working after a screen repair?
If the screen was replaced with a non-genuine part, or if the repair wasn’t done correctly, the TrueDepth camera may be misaligned or damaged. Only authorized Apple technicians should repair the screen to ensure Face ID continues to work.

Can Face ID be reset without a passcode?
No. You need your passcode to access Face ID settings and reset it. If you’ve forgotten your passcode, you’ll need to erase your iPhone using a computer or recovery mode, which will also remove Face ID data.

Does Face ID work with sunglasses?
Most sunglasses allow infrared light to pass through, so Face ID usually works. However, some polarized or UV-blocking sunglasses may interfere. If it doesn’t work, remove the glasses or set up an alternate appearance without them.

Why does Face ID fail when I’m wearing a hat or scarf?
Face ID needs to see your eyes, nose, and mouth. If a hat brim or scarf covers these, it can’t recognize you. Adjust the item so your face is clear, or use an alternate appearance.

Is Face ID secure if someone looks like me?
Face ID uses a detailed depth map and infrared image, making it very difficult to fool with a photo or a mask. The probability of a random person unlocking your phone is about 1 in 1,000,000, which is more secure than a fingerprint.

What should I do if Face ID says “Face ID is not available”?
This usually means the TrueDepth camera is damaged or has failed. Try restarting your iPhone first. If the message persists, contact Apple Support for hardware service.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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