When Face ID or Touch ID stops working on your iPhone, the cause often isn’t a broken sensor. Apple’s own troubleshooting steps start with simpler culprits: a smudged camera, a damp finger, a setting that got switched off, or a security feature doing exactly what it was built to do. This guide puts the fixes in order of likelihood and effort, from the easiest to the more involved, so you can fix the problem yourself before you book a Genius Bar visit.
The short answer: Clean the sensor first. Then restart your iPhone and enter your passcode once. Next, check that Face ID or Touch ID is turned on for the feature that’s failing. If none of that works, reset Face ID or re-add your fingerprint, then update iOS. If your iPhone still shows an error like “Face ID is not available” or “Unable to complete Touch ID setup,” it’s most likely a hardware problem, and you’ll need Apple’s help.
What Are Face ID and Touch ID?
Face ID and Touch ID are the two ways an iPhone can recognize you without a passcode. They unlock your phone, approve Apple Pay, and sign you in to apps.
- Face ID uses the TrueDepth camera, the sensor cluster at the top of the screen, to build a 3D map of your face. It’s on iPhone X and later models that don’t have a Home button.
- Touch ID reads your fingerprint through the Home button. On iPhone, it’s built into the Home button only. Some iPad models, such as iPad mini (6th generation) and iPad Air (4th and 5th generation), put the Touch ID sensor in the top button instead (Apple Support).
Both work quietly in the background when everything is fine. That’s why it’s so jarring when one suddenly stops recognizing you.
Before You Begin
- You know your device passcode. You can’t view or change any Face ID or Touch ID setting without it.
- You know which system your iPhone uses: Face ID (no Home button) or Touch ID (Home button)
- You have a soft, lint-free microfiber cloth
- You have a Wi-Fi connection and at least 50% battery, or you’re plugged in, in case you need to update iOS
- Your important data is backed up to iCloud or a computer. None of these fixes erase your data, but a backup is always smart before changing settings.
| Requirement | Details |
|---|---|
| Face ID devices | iPhone X and later with a TrueDepth camera |
| Touch ID devices | iPhone models with a Touch ID Home button (for example, iPhone SE 2nd and 3rd generation, and iPhone 8) |
| Current iOS | iOS 27.0.1 and iOS 26.7.1, both released September 28, 2026, which support iPhone 11 and later (Apple) |
| Check your version | Settings > General > About |
Step-by-Step Guide
Step 1: Clean the TrueDepth Camera or Home Button
This is the most commonly overlooked fix. Start here.
On a Face ID iPhone:
- Look at the top edge of your screen. This is the notch on older models or the Dynamic Island area on newer ones.
- Wipe it gently with a soft, lint-free microfiber cloth to remove oil, makeup, or pocket lint. Don’t use household cleaners, aerosol sprays, solvents, or abrasives, and keep moisture out of the openings (Apple Support).
- Check that your case or screen protector doesn’t cover any part of that area. Privacy screen protectors and thick protectors with a cut-out that doesn’t line up are frequent problems.
On a Touch ID iPhone:
- Dry your hands completely. Water, sweat, and lotion all confuse the sensor.
- Wipe the Home button with a dry microfiber cloth.
- Make sure your case doesn’t overlap the metal ring around the button.
- When you scan, cover the whole button, including the metal ring, and hold still. Don’t tap quickly.
Expected result: Lock your iPhone and try to unlock it. If it works, you’re done.
Step 2: Restart Your iPhone and Enter Your Passcode
A restart clears temporary glitches.
- Face ID iPhone: Press and hold the side button and either volume button until the power-off slider appears. Drag the slider, wait 30 seconds, then hold the side button until you see the Apple logo.
- Touch ID iPhone (SE 2nd/3rd generation, 8): Press and hold the side button until the slider appears. Drag it, wait, then hold the side button to turn the phone back on.
After a restart, your iPhone asks for your passcode before Face ID or Touch ID works again. This is normal. Apple lists other situations where you may need to enter your passcode instead of using Face ID or Touch ID:
- Face ID or Touch ID fails to recognize you five times in a row
- You haven’t unlocked the phone in 48 hours
- You haven’t unlocked the phone with the passcode in the last 6.5 days, and you haven’t unlocked it with Face ID or Touch ID in the last 4 hours
- The phone receives a remote lock command, or you use Emergency SOS
- You add or delete fingerprints
- You open the Touch ID & Passcode (or Face ID & Passcode) settings, or view your Medical ID
(Apple Support, Apple Platform Security)
Expected result: Enter your passcode once, lock the phone, then try Face ID or Touch ID again.
Step 3: Confirm Face ID or Touch ID Is Turned On for the Right Features
Face ID or Touch ID can work for unlocking but fail for Apple Pay, or the other way around. That’s because each feature has its own switch.
- Open Settings.
- Tap Face ID & Passcode, or Touch ID & Passcode on Home-button iPhones.
- Enter your passcode.
- Under the “Use Face ID For” or “Use Touch ID For” heading, make sure these are turned on: iPhone Unlock, iTunes & App Store, Wallet & Apple Pay, and Password AutoFill.
- Tap Other Apps to check that third-party apps, such as your banking app, have permission.
Expected result: The feature that was failing now accepts your face or fingerprint. If only Apple Pay is affected, the problem may be with your cards rather than biometrics.
Step 4: Fix Face ID Specifically (Face ID iPhones Only)
Check for blocking conditions
Face ID needs a clear view of your eyes, nose, and mouth. Common blockers include:
- Distance and angle: Hold the iPhone at arm’s length or closer, about 10–20 inches (25–50 cm) from your face, facing the TrueDepth camera. Lying in bed with the phone at a sharp angle often fails.
- Orientation: On iPhone 13 and later with iOS 16 or later, Face ID works in portrait and landscape. On earlier Face ID iPhones, and whenever you use Face ID with a Mask, hold the iPhone in portrait orientation (Apple Support).
- Lighting: Face ID works in the dark, but harsh backlighting or direct sun can interfere.
- Face coverings: Masks, scarves, and some sunglasses block it. On iPhone 12 and later, turn on Face ID with a Mask in Settings > Face ID & Passcode. An Apple Watch can also unlock your iPhone while you’re wearing a mask or sunglasses: turn on your watch under Unlock with Nearby Devices in Settings > Face ID & Passcode (Apple Support).
- Big appearance changes: Heavy makeup or beauty masks can cause failures. Tap Set Up an Alternate Appearance to add a second look.
Reset Face ID and re-enroll
- Go to Settings > Face ID & Passcode and enter your passcode.
- Tap Reset Face ID.
- Tap Set Up Face ID, then follow the prompts and move your head slowly in a circle. You’ll do two scans.
Expected result: A fresh face scan. This deletes only your stored face data. Your photos, apps, and passwords stay in place.
Step 5: Fix Touch ID Specifically (Home-Button iPhones Only)
If you’ve already cleaned and dried the Home button and it still won’t read your finger:
- Go to Settings > Touch ID & Passcode and enter your passcode.
- Tap the fingerprint that’s failing, such as Finger 1, then tap Delete Fingerprint.
- Tap Add a Fingerprint. Rest your finger on the button repeatedly, lifting and shifting it slightly each time.
- When asked to adjust your grip, scan the edges of your finger.
Tip: Enroll the same finger twice, or add a finger from your other hand. This helps if your skin changes with the seasons, such as dry winter hands.
Expected result: A new fingerprint appears in the list and unlocks reliably.
Step 6: Update iOS
Apple sometimes ships numbered “point releases,” the small updates like iOS 27.0.1 that fix bugs without adding features. If biometrics broke right after an update, a follow-up release may fix it.
- Go to Settings > General > Software Update.
- If an update appears, tap Update Now or Install Now, then enter your passcode.
- Keep the phone on Wi-Fi and charging until it restarts.
As of September 28, 2026, the current releases are iOS 27.0.1 and iOS 26.7.1 (Apple). Apple doesn’t always list biometric fixes in its release notes, so it’s worth installing the latest point release even when Face ID or Touch ID isn’t mentioned.
Step 7: Check Stolen Device Protection
If you can’t turn off or change Face ID or Touch ID, this is likely the reason. Stolen Device Protection is a security feature that might already be turned on by default. When your iPhone is away from a familiar location, such as home or work, some actions require Face ID or Touch ID with no passcode fallback, and some security changes also make you wait an hour and then authenticate with Face ID or Touch ID again (Apple Support).
- Go to Settings > Face ID & Passcode (or Touch ID & Passcode).
- Scroll to Stolen Device Protection to see whether it’s on.
- Check Require Security Delay: Away from Familiar Locations or Always.
The fix: Either wait out the security delay or make the change once you’re back home or at work. The awkward catch is that a security delay needs working biometrics to complete. If Face ID is completely broken while you’re traveling, you’ll need to be at a familiar location to make the change.
Step 8: Reset All Settings (No Data Lost)
This is the last software fix to try. It restores every setting to the factory default while keeping your content.
- Go to Settings > General > Transfer or Reset iPhone.
- Tap Reset, not “Erase All Content and Settings.”
- Tap Reset All Settings, enter your passcode, and confirm.
What it resets: Network settings and saved Wi-Fi passwords, the keyboard dictionary, location and privacy settings, and Apple Pay cards, which you’ll need to add again. What it keeps: Apple says no data or media are deleted, so your photos, messages, and apps stay put (Apple Support).
Configuration: Settings Worth Knowing
| Setting | Default | What it does |
|---|---|---|
| iPhone Unlock | On | Lets biometrics unlock the Lock Screen |
| iTunes & App Store | On | Approves purchases and downloads |
| Wallet & Apple Pay | On | Approves Apple Pay payments |
| Attention Aware Features (Face ID) | On | Checks that you’re looking at the screen before unlocking. Turning it off may help if you wear certain glasses, but it’s slightly less secure. |
| Stolen Device Protection | Might be on by default | Adds a security delay away from familiar places |
Tips and Troubleshooting
“Face ID is not available” or “Face ID has been disabled”
Why it happens: The TrueDepth camera isn’t responding. This often happens after a drop, water exposure, or a screen replacement by a non-Apple shop. Fix: Restart and update iOS once. If the message comes back, it’s a hardware problem.
“Failed. Unable to complete Touch ID setup” or Touch ID is greyed out
Why it happens: The sensor can’t talk to the phone. This is common after a Home button or screen repair. Fix: Try a different, completely dry finger. If enrollment still fails, Apple identifies this as a hardware issue (Apple Support).
It’s a hardware problem if:
- You see either error message above even after restarting and updating
- The problem started right after a drop, water damage, or a third-party repair
- You can’t enroll a face or finger at all, even though plain recognition failures were your first sign
- Animoji or portrait-mode selfies also stop working, which points to the TrueDepth camera
If any of these apply, contact Apple Support or book a Genius Bar appointment. Repeating software fixes won’t help. If you have AppleCare+, the repair may be covered.
FAQ
Why did my Face ID or Touch ID stop working out of nowhere? Most often it’s dirt on the sensor, a moisture problem, a toggle switched off during an update, or a bug in an iOS release. A passcode request after a restart or 48 hours of inactivity is normal behavior, not a failure.
Is it safe to reset Face ID or Touch ID? Will I lose data? Yes, it’s safe. Resetting deletes only your stored face or fingerprint data. Your photos, apps, and passwords aren’t affected.
Why can’t I turn off Face ID or Touch ID right now? Stolen Device Protection is probably on, and you’re away from a familiar location. Wait out the one-hour delay, or go home or to work.
Does updating iOS actually fix Face ID or Touch ID bugs? It can, if the bug was caused by software. It won’t fix a damaged sensor.
What’s the difference between fixing Face ID and fixing Touch ID? Face ID problems usually come from angle, distance, face coverings, or a blocked camera. Touch ID problems usually come from moisture, dirt, or a poor scan. The settings are in different places: Face ID & Passcode versus Touch ID & Passcode.
Wrapping Up
Most of the time, a wipe of the sensor, a restart, or a fresh enrollment gets biometrics working again. If not, check for an update and Stolen Device Protection before assuming anything is broken. Honestly, Stolen Device Protection catches a lot of people off guard, but it’s worth keeping on. Just know that it’s the reason your settings seem “stuck” when you’re traveling.
| Step | Action | Applies To |
|---|---|---|
| 1 | Clean sensor or button | Both |
| 2 | Restart and enter passcode | Both |
| 3 | Check feature toggles | Both |
| 4 | Check conditions, reset Face ID | Face ID |
| 5 | Delete and re-add fingerprint | Touch ID |
| 6 | Update iOS | Both |
| 7 | Check Stolen Device Protection | Both |
| 8 | Reset All Settings | Both |
Resources
Sources retrieved October 6, 2026: