Face ID Not Working – Complete Troubleshooting Guide 2025
Face ID has been a core feature of iPhones since the X, but when it suddenly stops working, the frustration is immediate. Whether the issue is a software glitch, a hardware failure, or something as simple as a dirty sensor, understanding what went wrong is the first step to getting it back. This guide draws on official Apple documentation, repair specialists, and user reports to help you diagnose and fix the problem for good.
Why Is My Face ID Not Working All of a Sudden?
Obstruction or Angle
Check if mask, sunglasses, or low light affect recognition.
Settings or Software Glitch
Restart iPhone, reset Face ID, or update iOS.
Hardware Damage
Water, drops, or repair can permanently disable TrueDepth camera.
Post‑Update Issues
Sometimes Apple patches break Face ID temporarily; reinstall may fix.
- Face ID failures fall into three categories: software glitch, physical obstruction, or permanent hardware fault.
- The most searched question “Why is my Face ID not working all of a sudden” often points to an iOS update or a minor settings change.
- Model‑specific reports: iPhone 12 and 13 have known issues after screen replacements; iPhone 15 has fewer reports due to newer design.
- The error “Face ID not available” almost always indicates a hardware problem (TrueDepth camera disconnected or damaged).
- The ‘Move iPhone Lower’ prompt during setup indicates the camera cannot detect the full face due to angle or obstruction.
- Repair costs for Face ID can be high (around $200‑$350) because the TrueDepth module is tied to the device’s serial number.
| Issue | Likely Cause | Quick Fix |
|---|---|---|
| Sudden stop | iOS update or settings change | Restart, check Face ID settings, re‑register face |
| Not available | Hardware failure | Contact Apple Support or visit repair shop |
| Move iPhone lower | Improper angle or obstruction | Hold phone at eye level, remove mask/sunglasses |
| After repair | Disconnected or damaged module | Requires professional reconnection or replacement |
| After water | Corrosion or short circuit | Immediate drying, then hardware check |
How to Fix Face ID Not Working on Specific iPhone Models
Face ID Not Working iPhone 11 – Step‑by‑Step Fix
The iPhone 11 uses the same TrueDepth system as earlier models but is especially prone to battery degradation that can interfere with the flood illuminator. Start with a restart and a Face ID rescan. If the issue persists, check battery health in Settings > Battery > Battery Health – a degraded battery may need replacement.
Face ID Not Working iPhone 12 – Troubleshooting Guide
iPhone 12 users have reported Face ID failures after third‑party screen replacements. As noted by repair specialists, the Face ID flex cable is easily damaged during screen swaps. If you’ve had a recent repair, the module may be disconnected or the interposer damaged. Apple’s support page advises that any non‑genuine part can cause the feature to become permanently unavailable.
Face ID Not Working iPhone 13 – Common Causes and Fixes
With the iPhone 13, Apple added landscape Face ID support in iOS 16. But the Dynamic Island on later models can be obstructed by screen protectors. Many cases also cover the sensor area. Clean the TrueDepth camera with a soft, dry cloth, remove any case, and try resetting Face ID from Settings.
Face ID Not Working iPhone 15 – What Has Changed?
iPhone 15 models feature enhanced infrared sensors for better low‑light performance. However, reports of sudden failures are fewer. If Face ID stops on an iPhone 15, a software glitch is more likely than hardware damage. Update to the latest iOS – as of 2025, iOS 18 and 19 had minor Face ID bugs that were patched in subsequent releases.
Face ID Not Working iPhone XR / XS / X – Still Supported?
Yes, all models from iPhone X onward support Face ID. Older devices may experience slower recognition due to aging hardware. The dot projector on early models is more susceptible to damage from drops. If you see a “Face ID Not Available” message on an iPhone X, the TrueDepth camera likely needs professional service.
If Face ID works for some apps but not others, check the app’s permissions under Settings > Face ID & Passcode. Some apps allow you to disable Face ID independently.
What Does ‘Face ID Not Available’ Mean and How to Fix It?
The “Face ID Not Available” error appears when the TrueDepth camera system cannot initialise. According to Apple’s official documentation, this message typically indicates a hardware failure – the dot projector, flood illuminator, or infrared camera is damaged. A software glitch can produce the same error, but it’s less common.
If you see this error after a screen replacement, a third‑party repair may have disconnected the Face ID flex cable. In some cases, even reconnecting the cable does not restore functionality because Apple’s firmware serialises the TrueDepth module – a security measure that prevents unauthorised repairs.
Can I Use Face ID Again After a Factory Reset?
A factory reset (Settings > General > Transfer or Reset iPhone > Erase All Content and Settings) will remove corrupted settings, but if the hardware is faulty, the error will return during the setup process. As Asurion notes, if Face ID fails immediately after a full erase, you are almost certainly dealing with a hardware issue.
Do not attempt to clean the TrueDepth camera with liquids or sharp objects. Use only a dry, lint‑free cloth. Any moisture can further damage the infrared components.
How to Fix Face ID After an iOS Update
Software updates sometimes introduce bugs that temporarily break Face ID. For example, iOS 14.0 had a known glitch that was fixed in 14.0.1. More recently, users reported Face ID issues after the iOS 26 upgrade (rumoured in 2025). The solution is often straightforward.
Reset Face ID Settings
Go to Settings > Face ID & Passcode, tap Reset Face ID, then set up a new scan. This clears corrupted data without affecting other settings.
Update to the Latest Patch
Apple typically releases a minor update within weeks of a major release to address Face ID bugs. Check Settings > General > Software Update and install any available update. A YouTube walkthrough from a repair channel confirms that updating often resolves the problem.
Reinstall iOS (Advanced)
If a simple update does not work, you can reinstall iOS via a computer without erasing data. Connect your iPhone to a Mac or PC, open Finder or iTunes, and click “Update”. This replaces system files while keeping your content intact.
By default, Face ID won’t work if anything covers your mouth and nose – this is stated on Apple’s support page. Since iOS 15.4, you can enable Face ID with a mask if the camera can see your eyes.
Face ID Not Working After Repair or Damage – When to Seek Professional Help
Repair-related Face ID failures are among the most frustrating. An Instagram reel from repair specialist @repair_jedi (2025) lists the four main suspects: a damaged module, interposer issues, CPU cold solder joints, or a broken flex cable. None of these are user‑fixable.
Apple’s official repair cost for a TrueDepth camera replacement ranges from roughly $300 to $600, depending on the model and whether you have AppleCare+. Third‑party shops may offer lower prices, but they risk disabling other features – True Tone, for example – because of Apple’s serialisation locks. The Right to Repair advocacy group argues that such locks are anti‑consumer and urges legislative reform.
iFixit’s Face ID repair guides show the complexity of the micro‑soldering needed. Unless you have professional equipment, attempting a DIY repair is not recommended.
When Did Face ID Issues Become Prominent?
- 2017 – Face ID introduced with iPhone X. Early reports of failure after drops.
- 2020 – iOS 14 update briefly broke Face ID for some users – fixed in 14.0.1.
- 2022 – iPhone 12 and 13 users report Face ID failure after third‑party screen repairs.
- 2024 – iOS 18 added multiple face support; some experienced “Face ID not available” after updates.
- 2025 – iOS 26 (rumoured) causes Face ID glitch; Apple support page updated. Instagram repair videos surge.
What Is Certain and What Remains Unclear About Face ID Troubleshooting?
| Established Information | Information That Remains Unclear |
|---|---|
| Face ID will not work if mouth/nose are covered (by default). | Whether third‑party repair shops can restore Face ID without losing other features (e.g., True Tone). |
| Restarting the iPhone resolves many temporary software glitches. | Whether Apple will release a software fix for the iOS 26 Face ID issue (if it exists). |
| “Face ID not available” message indicates the TrueDepth camera cannot be initialised – usually hardware. | Whether moving the iPhone lower during setup actually fixes the camera recognition or just changes the angle. |
How Does Face ID Actually Work – And Why Does It Fail?
Face ID relies on the TrueDepth camera system, which projects over 30,000 invisible infrared dots onto your face. Any damage to the projector or the flood illuminator immediately breaks recognition. Since iPhone X, software updates have occasionally altered how Face ID handles permissions or mask detection. Users upgrading from a very old iOS sometimes see sudden failures because the system changes the way it interacts with the infrared sensors.
Third‑party screen replacements often disconnect the Face ID flex cable. Even if the cable is reconnected, Apple’s firmware may reject the module if the parts are not original – a practice known as “part serialisation”. This is why many repair technicians advise using only genuine Apple parts for any repair that involves opening the display.
The “Move iPhone Lower” prompt occurs when the TrueDepth camera cannot capture the full face at the current distance or angle. It is a guidance step designed to help the user position the phone correctly. It does not necessarily indicate a fault – simply a need to adjust.
What Do Apple and Repair Experts Say?
“By default, Face ID doesn’t work if anything is covering your mouth and nose.”
Apple Support page (support.apple.com/en-gb/118243)
“There are usually four main suspects when Face ID behaves like this: a damaged module, interposer issues, CPU cold solder joints, or a broken flex cable.”
Instagram repair reel (@repair_jedi, 2025)
“If you are experiencing Face ID issue after iOS 26 upgrade, you can follow these troubleshooting steps.”
YouTube video description (2025)
What’s Next for Face ID Reliability?
With iOS 26, Apple may issue a patch specifically addressing Face ID stability. iPhone 16 Pro models (2025) are expected to feature an improved infrared sensor that is less sensitive to obstructions. Additionally, pending Right to Repair legislation could force Apple to allow third‑party Face ID repairs without serialisation locks, making fixes more affordable and accessible.
Frequently Asked Questions
Can I use Face ID with sunglasses?
Yes, most sunglasses allow infrared pass-through. However, some polarized or coated lenses may block the Dot Projector.
Will a factory reset fix Face ID?
Yes, if the issue is software‑related. Back up first, then go to Settings > General > Transfer or Reset iPhone > Erase All Content and Settings.
How do I turn off Face ID when it stops working?
Go to Settings > Face ID & Passcode, then toggle off “iPhone Unlock”, “iTunes & App Store”, etc. You can also disable Face ID for specific apps in their settings.
Is Face ID covered under Apple warranty?
Yes, if the device is under AppleCare+ or standard warranty and the failure is not due to accidental damage. Water damage voids warranty.
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