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Face ID Not Working on iPhone? Causes, Fixes and Repair Options
Face ID is one of those features you stop noticing until the day it stops working. The phone sits there, the little face icon shakes, and suddenly you are typing a passcode you have half forgotten every time you want to check a message.
The reassuring news is that most Face ID failures are not hardware failures. A smudged sensor, a thick case, a new screen protector, an iOS glitch or simply holding the phone at an unusual angle account for a large share of the cases that come across our counter. Those cost nothing to put right. A smaller group of cases involve the TrueDepth camera system itself, and those do need proper diagnosis rather than guesswork.
This guide walks through both. It explains how Face ID actually works, what the various error messages mean, what you can safely try yourself and in what order, and how to recognise the point where home troubleshooting has run out of road. It is written for iPhone owners rather than technicians, with additional notes for anyone in Telford, Oakengates, Broseley or the wider Shropshire area who would rather have someone look at it in person.
Quick Answer
Why is Face ID not working on my iPhone?
In most cases the TrueDepth camera at the top of the screen is obstructed, the iPhone is being held outside the range Face ID expects, or iOS has developed a temporary fault. Apple’s own guidance is to make sure nothing is covering the camera area, hold the phone within arm’s length of your face, at 25 to 50 centimetres, keep your eyes, nose and mouth visible, and run the latest version of iOS.
Work through this order:
- Clean the top of the screen, including the notch or Dynamic Island area
- Remove any case or screen protector that overlaps the sensor area
- Check that Face ID is switched on in Settings > Face ID & Passcode
- Restart the iPhone
- Update iOS
- Add an alternative appearance, or reset Face ID and set it up again
If Face ID stopped after a screen repair, a drop or a soaking, or if you see a message saying a problem was detected with the TrueDepth camera, the cause is more likely to be physical. Apple states that the TrueDepth camera contains laser components that may be disabled for safety reasons if the device malfunctions or is damaged, and that only a trained technician should service the device. That is the point to stop troubleshooting and have it assessed.
Never be tempted to leave your iPhone without a passcode or with security features turned off as a workaround.
How Face ID and the TrueDepth Camera Actually Work
Understanding roughly what is happening makes the fault patterns much easier to read.
Face ID does not take a photograph of you and compare it with a stored picture. The TrueDepth camera system projects and analyses thousands of invisible dots to build a depth map of your face, and captures an infrared image at the same time. Apple’s overview of Face ID technology describes how a neural processor within the Secure Enclave then turns that data into a mathematical representation and compares it against the enrolled version.
Several separate components sit behind that small cutout at the top of the screen, and they all have to work together:
| Component | What it does |
|---|---|
| Flood illuminator | Bathes your face in infrared light so the system can see you in darkness |
| Infrared camera | Captures the infrared image of your face |
| Dot projector | Projects the invisible dot pattern used to build the depth map |
| Proximity and ambient light sensors | Help the system judge distance and lighting conditions |
| Front camera | Handles ordinary selfies and video calls, and sits in the same assembly |
| Secure Enclave | Stores and processes the facial data, isolated from the rest of iOS |
Three consequences follow from this design, and they explain most of what you will read further down.
It is an infrared system, not a camera in the ordinary sense. That is why Face ID works in a dark bedroom but can struggle in very bright direct sunlight, and why certain sunglasses designed to block particular types of light can interfere with it.
It measures depth, so distance and angle matter. Apple’s guidance is to hold the device an arm’s length or closer, between 25 and 50 centimetres from your face. Too close, too far, or too flat an angle across the phone and the system may not have enough of a depth map to work with.
Every part has to be present and functioning. If the dot projector fails, or the flex cable feeding it is damaged, there is no depth map at all, and iOS will not simply carry on with a degraded version. Face ID either has what it needs or it stops.
There is also a security consequence worth understanding. Face ID data is encrypted and protected by the Secure Enclave, never leaves the device and is not backed up to iCloud. The components are cryptographically tied to that particular iPhone’s Secure Enclave, which is why the TrueDepth system cannot simply be swapped between handsets, and why a Face ID repair is a more specialised job than replacing a battery or a charging port.
Attention Awareness and the Failed Attempt Limit
By default, Face ID checks that your eyes are open and your attention is on the device, which is what stops someone unlocking your iPhone while you sleep. If you often wake with the phone flat on a bedside table and Face ID refuses, that is attention detection doing its job rather than a fault.
Apple also lists the situations where a passcode is required rather than Face ID: after the device restarts, when it has not been unlocked for more than 48 hours, when the passcode has not been used for six and a half days and Face ID has not unlocked it in the last four hours, after a remote lock command, after five unsuccessful Face ID attempts, and when Emergency SOS is initiated. Several perfectly healthy iPhones get diagnosed as broken every week when they are simply in one of those states.
Which iPhones Support Face ID?
Model matters, because the assumption that “all modern iPhones have Face ID” is not quite right. According to Apple’s list of models that support Face ID, the iPhones that use it are:
| Generation | Models with Face ID |
|---|---|
| iPhone 17 family | iPhone 17e, iPhone 17, iPhone Air, iPhone 17 Pro, iPhone 17 Pro Max |
| iPhone 16 family | iPhone 16e, iPhone 16, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max |
| iPhone 15 family | iPhone 15, iPhone 15 Plus, iPhone 15 Pro, iPhone 15 Pro Max |
| iPhone 14 family | iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max |
| iPhone 13 family | iPhone 13 mini, iPhone 13, iPhone 13 Pro, iPhone 13 Pro Max |
| iPhone 12 family | iPhone 12 mini, iPhone 12, iPhone 12 Pro, iPhone 12 Pro Max |
| iPhone 11 family | iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max |
| iPhone X family | iPhone X, iPhone XR, iPhone XS, iPhone XS Max |
Apple also lists Face ID on the iPad Pro, across the 11-inch and larger models. The iPhone SE range is the notable exception in the iPhone line, using Touch ID through the home button instead, so if you own an SE there is no Face ID to fix.
Two practical points follow. Older models in this list have now been in circulation for years, and age brings its own pattern of faults: worn flex cables, previous repairs, accumulated knocks. And behaviour differs slightly by generation. Face ID works in both portrait and landscape orientation on iPhone 13 and later running iOS 16 or later, while earlier models expect portrait. Masked Face ID, which works with your mouth and nose covered as long as your eyes are visible, needs iPhone 12 or later on iOS 15.4 or later, and works in portrait orientation.
Common Face ID Error Messages and What They Mean
The exact wording tells you a great deal about where to look.
| Message | What it usually means | Typical next step |
|---|---|---|
| “Face ID Is Not Available. Try setting up Face ID later.” | iOS cannot currently communicate with the TrueDepth system. It can be temporary, particularly after an update, or it can indicate a hardware fault | Restart, update iOS, then assess if it persists |
| “A Problem Was Detected with the TrueDepth Camera. Face ID has been disabled.” | Apple’s on-device diagnostics have found a fault with the TrueDepth camera and disabled it | Update iOS, then arrange a professional assessment |
| “Unable to Activate Face ID on This iPhone” | Setup cannot complete, often because the system is not responding or a component is not being detected | Restart and retry once; persistent failures point to hardware |
| “Face ID Is Not Available. Try again later.” | A temporary state, often after several failed attempts or a warm or cold device | Wait, restart, and try again |
| “Move iPhone a little higher / lower / farther away” during setup | Positioning feedback rather than a fault | Adjust position and follow the prompts |
| Face ID never appears in Settings at all | The device does not support Face ID, or iOS is not detecting the hardware | Confirm the model, then have it assessed |
The second message in that table is the significant one. Apple’s guidance on Face ID alerts explains that diagnostics in iOS 14.6 and later can detect an issue with the TrueDepth camera, and that the camera contains lasers that may be disabled for safety reasons if the device malfunctions or is damaged. Apple’s advice is to update to the latest version of iOS, and if the problem continues, that service may be needed.
That is not a message to work around. It is the phone telling you a safety mechanism has engaged.
Software-Related Causes
Software accounts for a good share of Face ID complaints, and it is always worth eliminating first because none of it risks anything.
iOS Bugs and Interrupted Updates
Face ID depends on parts of iOS that occasionally break in a particular release, or fail to install cleanly. An update that ran out of battery halfway, or a restore that did not complete, can leave the biometric subsystem in an odd state. This tends to show as Face ID working intermittently or failing immediately after an update, and it usually clears with a restart followed by the next update.
Face ID Switched Off for Specific Uses
Face ID is not a single on or off switch. In Settings > Face ID & Passcode you can enable it separately for iPhone Unlock, iTunes and App Store, Wallet and Apple Pay, Password AutoFill, and individual apps. People often conclude Face ID is broken when it is only switched off for the one thing they were trying to do, frequently after someone else set the phone up or after restoring from a backup.
Restored Backups and Transfers
Face ID data is stored in the Secure Enclave and never leaves the device, so it does not travel in an iCloud or computer backup. Set up a new iPhone from a backup and you must enrol your face again on the new handset. If Face ID appears to have “not restored”, that is expected behaviour rather than a fault.
Screen Time, MDM and Profiles
A work or school device managed through Mobile Device Management, or an iPhone with Screen Time restrictions, may have biometric options limited by policy. Check Settings > Screen Time > Content & Privacy Restrictions, and look under Settings > General > VPN & Device Management for a configuration profile. If the device belongs to an employer, the IT team controls this rather than you.
Beta Software
Public and developer betas break things by design. If you are running a beta version of iOS and Face ID has become unreliable, that is a strong candidate for the cause, and the sensible move is to wait for the next beta or return to the public release.
Storage and Performance Problems
An iPhone with almost no free storage misbehaves in unpredictable ways, and biometric enrolment is one of the things that can fail. If your device is showing a few hundred megabytes free, clear some space before drawing conclusions about the hardware.
Environmental and Everyday Causes
These are the ones worth checking before anything else, because they are common, harmless and quick to rule out.
A Dirty or Smudged Sensor Area
The area around the notch or Dynamic Island picks up face oils, foundation, sun cream, hand cream and pocket dust. Infrared light passes through that layer badly. Apple’s guidance is straightforward: make sure nothing is covering the TrueDepth camera, including a smudge, a case or a screen protector. A soft, dry, lint free cloth across the top of the screen fixes a surprising number of cases, particularly on phones used with makeup or after a day in the garden.
Cases That Overlap the Sensor
Thick cases, folio and wallet cases, rugged cases and cheap replacements sometimes sit slightly proud of the top of the display or cast a shadow across the sensor cutout. Some magnetic flip cases also interfere. The test is simple: take the case off completely and try Face ID a few times.
Screen Protectors
Most modern tempered glass protectors are cut around the sensor area and cause no problems at all. Trouble comes from protectors that are misaligned by a couple of millimetres, cheap ones with a heavy tint or coating across the top strip, privacy filters, and protectors with trapped dust or bubbles near the notch. Fitting a new protector immediately before Face ID stopped working is a strong clue.
How You Are Holding the Phone
Face ID wants your face reasonably square to the screen at a sensible distance. Common failure situations include the phone flat on a desk while you lean over it, propped low in a car cradle, held at arm’s length above your head in bed, or used in landscape on a model that expects portrait. On iPhone 13 and later with iOS 16 or later, landscape unlocking is supported, so an older phone failing in landscape is behaving normally rather than badly.
Bright Sunlight and Difficult Light
Because Face ID relies on infrared, strong direct sunlight can wash out the infrared image and cause failures outdoors that never happen inside. Moving into shade usually settles it.
Sunglasses, Masks, Hats and Appearance Changes
Some sunglasses block the infrared wavelengths Face ID uses, and Apple specifically suggests removing sunglasses designed to block certain types of light if Face ID is failing. Masks are handled by masked Face ID on iPhone 12 and later with iOS 15.4 or later, and only when your eyes are visible.
Bigger changes in appearance also matter, though Face ID adapts well over time. A new full beard, a dramatic change in hairstyle that alters the face outline, heavy makeup, a new pair of everyday glasses, or the aftermath of dental work can all reduce reliability for a while. Face ID learns from successful unlocks that follow a passcode entry, so it often recovers on its own within a few days. If it does not, an alternative appearance is the designed solution.
Cold, Heat and Wet Hands
An iPhone that has become very hot in a car or very cold on a winter walk may temporarily restrict features until it returns to a normal operating temperature. Water on the screen surface also disrupts the sensor area. Neither is a fault.
Hardware-Related Causes
When the environmental and software checks all come back clean, attention turns to the hardware.
TrueDepth Component Failure
The flood illuminator, dot projector and infrared camera are small, precise components mounted on a shared flex assembly. Any one of them can fail on its own, and when it does the message is typically that a problem was detected with the TrueDepth camera, or Face ID simply disappears from Settings. Failures of this kind happen after drops, after liquid exposure, after previous repairs, and occasionally with age and no obvious cause at all.
Damaged Flex Cables
The sensor assembly connects to the logic board through fine flex cables that run behind the display. These can be pinched, stretched or torn during a repair, or damaged by a hard impact even where the glass survived. A partially damaged flex often produces intermittent behaviour: Face ID working in the morning, failing in the afternoon, returning after a restart.
Impact Damage to the Sensor Assembly
A drop that lands on the top of the phone transmits force straight to the area behind the notch. The glass may look perfect while a component behind it has shifted or cracked internally. If Face ID stopped working the same day the phone was dropped, that connection is very likely real.
Liquid Ingress and Corrosion
Water does its damage slowly, through corrosion on connectors and flex contacts rather than instantly. A phone that got wet, dried out and worked normally for a fortnight can lose Face ID afterwards. Covered in more detail below.
Logic Board and Secure Enclave Faults
Less commonly, the fault sits on the logic board rather than in the sensor assembly. Because the TrueDepth components are cryptographically paired to the Secure Enclave, board level faults in the relevant circuitry can disable Face ID even when every sensor is physically intact. Diagnosing this requires equipment and experience rather than trial and error.
Previous Repairs
Any earlier work on the phone matters, particularly display and front camera repairs. This deserves its own section, because it is the single most common hardware related cause we see.
Face ID After a Screen Replacement
Let us be clear about this from the outset, because there is a lot of poor information online. Replacing an iPhone screen does not automatically break Face ID. Plenty of screen repairs are carried out every day without any effect on it. But screen replacement is the repair most likely to disturb Face ID, for reasons that are worth understanding.
Why a Screen Repair Can Affect Face ID
On Face ID iPhones, the TrueDepth sensor assembly is not part of the replacement screen you buy. It is a separate component that has to be transferred from the original display to the new one. That transfer is delicate work: the assembly is held with adhesive and small brackets, the flex cables are fine and short, and heat, prising or a moment of clumsiness can damage them.
Three things typically go wrong:
- The sensor assembly is damaged during transfer. Torn or creased flex, a cracked dot projector housing, or a bent connector.
- The assembly is not properly reseated. Cables not fully clicked home, or brackets left off, giving intermittent behaviour.
- The assembly is replaced rather than transferred. A TrueDepth module from a different iPhone will not work, because it is paired to the original device’s Secure Enclave. Face ID cannot be transplanted between handsets.
That third point is the one people find hardest to believe. It is not a commercial restriction dressed up as security; it is fundamental to how the system protects your biometric data.
Genuine, Used and Unknown Parts
There is a second, separate question about the display itself. Apple’s guidance on genuine iPhone displays explains that non-genuine displays can affect Multi-Touch response, True Tone, the ambient light sensor, brightness and battery drain, and that repairs by untrained people using non-genuine parts may affect the safety of the device or the functionality of the display.
On iPhone 11 and later, excluding SE models, you can see what iOS thinks of the parts in your phone under Settings > General > About, where a Parts and Service History section reports a display as Genuine, Used or Unknown. That is useful information if you have bought a second-hand iPhone and are trying to understand its history.
It is worth separating the two issues cleanly. A non-genuine display may trigger a message about being unable to verify a genuine Apple display, and may affect True Tone or auto-brightness. That is a different matter from Face ID, which lives in the transferred sensor assembly. Both can be affected by the same repair, but they are not the same fault, and diagnosing them properly means telling them apart. If you would like the longer version, our page on genuine versus aftermarket parts sets out what changes with each choice.
The iPhone 13 Story
For a period after the iPhone 13 launched, replacing the display with anything other than the original disabled Face ID, which caused considerable concern in the repair industry. Apple then removed that behaviour in iOS 15.2, and third party iPhone 13 screen repairs no longer disable Face ID by themselves. It is worth knowing about because plenty of older articles still describe the original situation as though it were current.
What This Means If You Are Choosing a Repairer
Screen replacement on a Face ID iPhone is not an inherently risky job, but it is a job where care and experience show. Reasonable questions to ask before handing your phone over include whether the sensor assembly is transferred rather than substituted, whether Face ID is tested before you collect the device, and what happens if it is not working afterwards.
We carry out iPhone repairs at our Telford and Broseley shops, and we check Face ID as part of testing a display repair before handing the phone back, so that any problem is identified while the device is still with us rather than a week later.
Face ID After Water or Impact Damage
These two causes behave differently from each other and from everything else, so they are worth separating out.
After Water Exposure
Modern iPhones carry an IP rating, but water resistance is not permanent and degrades with age, wear, drops and previous repairs. Water that reaches the top of the display can affect the sensor assembly directly, and even a small amount that dries away leaves residue behind.
The pattern to watch for is delayed failure. Corrosion is progressive, so the sequence of getting wet, drying out, working fine for days or weeks and then losing Face ID is common and often confuses people, because the soaking no longer feels connected to the fault.
If your iPhone has been in water:
- Stop charging it and switch it off if you can
- Do not use a hairdryer, an oven, a radiator or high pressure compressed air
- Do not put it in rice, which achieves very little and introduces starch and dust into the openings
- Let it dry in a warm, airy place, with the ports facing down
- Have it assessed sooner rather than later if anything at all is misbehaving
Salt water, pool water and sugary drinks are considerably more aggressive than clean fresh water, because of what they leave behind when they evaporate. If Face ID has stopped after any of those, a prompt internal inspection is worthwhile even if everything else appears normal.
After a Drop or Impact
Impact damage tends to be immediate and obvious in its timing, if not in its appearance. Face ID that stopped on the day the phone hit the pavement is very probably related to that event, whether or not the glass broke.
Things to note and mention when you have it looked at:
- Whether the front camera and video calls still work, since the front camera shares the assembly
- Whether the earpiece speaker still works on calls, since it sits in the same region on many models
- Whether the failure is total or intermittent
- Whether the phone was in a case, and where it landed
A phone that lost Face ID, the front camera and the earpiece simultaneously is pointing clearly at the sensor assembly. One that lost only Face ID could be that assembly, a flex cable or something on the board, which is exactly the sort of question a proper diagnostic answers.
Safe Troubleshooting Steps in Order
Work through these in sequence. Everything here is safe, reversible and requires no tools. Stop as soon as Face ID starts working.
Step 1: Clean the Top of the Screen
Wipe the area around the notch or Dynamic Island with a soft, dry, lint free cloth. If there is makeup or sun cream, dampen the cloth very slightly with water and dry immediately afterwards. Do not use household cleaners or spray anything directly onto the phone.
Step 2: Remove the Case and Screen Protector
Take the case off completely. If you have fitted a screen protector recently, look closely at how it sits over the sensor cutout, checking for overlap, tint, bubbles or trapped dust. Test Face ID several times with the case off before deciding.
Step 3: Check Your Position
Hold the phone an arm’s length or closer, between 25 and 50 centimetres from your face, roughly square to your face rather than at a steep angle. Make sure your eyes, nose and mouth are visible, and that nothing is casting a heavy shadow. Try indoors, away from strong direct sunlight, and remove sunglasses.
Step 4: Check Your Face ID Settings
Go to Settings > Face ID & Passcode and enter your passcode. Confirm that Face ID is set up, and that the specific uses you need are switched on: iPhone Unlock, iTunes and App Store, Wallet and Apple Pay, Password AutoFill, and any relevant apps. Check that Require Attention for Face ID is set the way you expect.
Step 5: Restart the iPhone
On models with Face ID, press and hold the side button together with either volume button until the power off slider appears, drag it across, wait half a minute, then hold the side button until the Apple logo appears. A restart clears a good number of temporary faults.
Step 6: Update iOS
Go to Settings > General > Software Update and install anything available. Apple’s advice for both general Face ID problems and TrueDepth camera alerts begins with running the latest version of iOS. Back up first, and keep the phone on charge and on Wi-Fi during the update.
Step 7: Set Up an Alternative Appearance
If Face ID works sometimes but not reliably, or your appearance has changed, this is often the answer. Go to Settings > Face ID & Passcode > Set Up an Alternative Appearance and follow the prompts. It is useful for a very different look, such as with and without heavy makeup, or with a beard grown or shaved off.
Step 8: Reset Face ID and Enrol Again
Go to Settings > Face ID & Passcode > Reset Face ID, then set it up again from scratch. This clears the stored mathematical representation and starts over, which resolves cases where enrolment has become unreliable rather than where the hardware has failed. Make sure you know your passcode before doing this.
If setup will not complete, or you see a message saying Face ID cannot be activated, that is a meaningful result rather than a failure on your part. It suggests the system is not responding as it should.
Step 9: Check Restrictions and Profiles
Look under Settings > Screen Time > Content & Privacy Restrictions, and under Settings > General > VPN & Device Management. If the phone is managed by an employer or school, speak to whoever administers it.
Step 10: Stop and Have It Assessed
If you have worked through the above and Face ID is still not working, further home experimentation is unlikely to help and some of the more drastic suggestions online carry real risk. That is the point to get it looked at.
When Resetting All Settings Is and Is Not Appropriate
Reset All Settings, found under Settings > General > Transfer or Reset iPhone > Reset, is often recommended online as a Face ID fix. It deserves a more careful treatment than it usually gets.
It does not delete your photos, messages or apps, but it does clear a lot of accumulated configuration: Wi-Fi networks and passwords, Bluetooth pairings, VPN and APN settings, keyboard dictionary, home screen layout, notification and privacy settings, and wallpaper. On a phone with dozens of saved networks and paired devices, restoring all of that takes real time.
It may be worth considering when:
- Face ID worked normally until a specific software change, and restarting and updating did not help
- Several unrelated system features have started misbehaving at once, suggesting a broadly confused configuration
- You have already tried resetting Face ID and enrolling again
- You have a current backup and know your passcode and Apple Account details
It is not the right move when:
- Face ID stopped immediately after a screen repair, a drop or water exposure, where the cause is physical
- You are seeing a message that a problem was detected with the TrueDepth camera, which is a hardware diagnostic result
- Face ID has never appeared in Settings on a model that should have it
- You do not have a backup, or you are unsure of the passcode or Apple Account password
The general principle: settings resets fix settings problems. They do nothing for damaged hardware, and the time cost is not trivial. Erasing the iPhone completely goes a step further again and should not be attempted as a Face ID fix without a verified backup and a clear reason to believe software is at fault.
Symptoms and Solutions at a Glance
| Symptom | Most likely cause | What to do |
|---|---|---|
| Face ID fails only outdoors | Bright sunlight affecting the infrared system | Move into shade; no fault present |
| Face ID fails only in bed or lying down | Attention detection and viewing angle | Hold the phone squarer to your face |
| Failing since a new screen protector went on | Protector overlapping or tinting the sensor area | Remove or reposition the protector |
| Failing since a new case | Case shadowing or covering the sensor | Test with the case removed |
| Failing since a haircut, beard or new glasses | Appearance change | Add an alternative appearance |
| Works for unlocking but not Apple Pay | Face ID switched off for that use | Enable it in Face ID & Passcode settings |
| Asks for a passcode first thing every morning | Normal security behaviour after 48 hours or a restart | No action needed |
| Stopped right after an iOS update | Software fault | Restart, then update again |
| Gone after restoring from a backup | Face ID data does not transfer between devices | Enrol your face again |
| “Face ID Is Not Available” persists after a restart | Software fault or hardware fault | Update iOS, then have it assessed |
| “A Problem Was Detected with the TrueDepth Camera” | Diagnostics have disabled the camera | Update iOS, then arrange a professional assessment |
| Setup will not complete at all | System not responding as expected | Restart once, then have it assessed |
| Stopped after a screen replacement | Sensor assembly damage, poor reseating or substitution | Return to the repairer, or seek a diagnostic |
| Stopped after a drop | Impact damage to the sensor assembly or flex | Professional assessment |
| Stopped days or weeks after getting wet | Progressive corrosion | Professional assessment, promptly |
| Face ID plus front camera plus earpiece all dead | Sensor assembly fault | Professional assessment |
Privacy and Security Considerations
Face ID is a security feature, so it is worth being deliberate about the shortcuts people take when it stops working.
Your face data stays on the device. The mathematical representation of your face is encrypted and protected by the Secure Enclave, does not leave the iPhone and is not included in backups. A repairer cannot see it, copy it or transfer it, and neither can Apple.
Do not remove your passcode. The most common bad advice given to someone with broken Face ID is to turn security off for convenience. Without a passcode there is no device encryption in any meaningful sense, Apple Pay will not work, and anything on the phone is available to whoever picks it up. Typing a passcode a few extra times a day is a small price by comparison.
Use a strong passcode while Face ID is out of action. You will be entering it far more often, which means more opportunity for someone to watch. A six digit code is the minimum sensible option and an alphanumeric one is better. Shield the screen in public, in cafés and on public transport.
Turn off Find My before a repair, and back up first. Any reputable repairer will ask you to sign out of Find My so they can test the device properly. Back up to iCloud or a computer before handing it over. You should never be asked for your Apple Account password.
Be sceptical of “Face ID repair” shortcuts. Anything that promises to restore Face ID by swapping a module from another iPhone, or by installing modified software, misunderstands or ignores how the pairing works. Aftermarket parts and unofficial software can also introduce genuine safety issues, which is why Apple states that improper repair, modification or use of non-genuine components in the laser systems may prevent safety mechanisms from working properly.
Check the Parts and Service History if you are buying used. On iPhone 11 and later, excluding SE models, Settings > General > About shows whether parts are recognised as Genuine, Used or Unknown. It is a quick way to understand what a second-hand phone has been through.
When to Stop Troubleshooting and Get Help
Home troubleshooting has a natural end point. Push past it and you risk turning an inconvenience into damage.
Stop and seek a professional assessment when:
- You see a message saying a problem was detected with the TrueDepth camera and Face ID has been disabled, and updating iOS has not cleared it
- Face ID stopped immediately after a screen repair, a drop or liquid exposure
- Setup will not complete, or Face ID has disappeared from Settings entirely on a model that supports it
- The front camera, earpiece or proximity sensor have failed alongside Face ID
- Face ID is intermittent in a way that tracks how the phone is held or the temperature, suggesting a marginal connection
- You have completed the safe steps above with no change
- Anyone suggests opening the phone, heating the display or prising components as a fix you should attempt yourself
That last point deserves emphasis. The TrueDepth system contains laser components, and Apple is explicit that only a trained technician should service the device, warning that improper repair or modification could lead to hazardous exposure and injury to eyes or skin. This is not a reasonable first attempt at DIY, and no guide, including this one, should be treated as instructions for opening a phone.
What a Professional Diagnostic Should Involve
A worthwhile assessment is more than a quick look and a quote. It should include:
- A conversation about history: drops, water, previous repairs, when the fault started and what else changed
- Checking the software state, the iOS version and whether the fault survives a restart
- Checking Parts and Service History and any display or battery messages
- Testing related components, including the front camera, earpiece and proximity sensor, since shared failures narrow things down
- Inspecting the sensor assembly and its connectors under magnification where the device is opened, with your consent
- A clear explanation of what was found, what can and cannot be repaired, and what the options are before any work is authorised
That last item matters more with Face ID than with most faults, because some outcomes cannot be repaired at any price. An honest assessment says so plainly.
We offer this kind of diagnostic as part of our wider repair services, and if the news is that Face ID cannot be restored, we will tell you that rather than sell you work that will not solve it.
Repair Versus Replacement: How to Think About It
Face ID faults sit across a wider range of outcomes than most repairs, so the decision deserves a little structure.
What Is Usually Repairable
- Damage caused during a previous repair, where the original sensor assembly is intact and can be correctly refitted
- Connector and seating problems, where the components are healthy but not properly connected
- Faults where a related component, rather than the TrueDepth system itself, is causing the symptom
- Software related failures, which are not repairs at all in the hardware sense
What Is Often Not Repairable
- A physically destroyed or missing original TrueDepth assembly, because a replacement from another iPhone will not pair with your Secure Enclave
- Extensive corrosion through the sensor assembly and its connectors following liquid ingress
- Certain logic board faults in the associated circuitry, where board level repair may be uneconomic or not viable
This is the honest position, and it is why anyone promising a guaranteed Face ID fix before looking at the phone should be treated with caution.
Questions Worth Asking Yourself
How old is the iPhone, and how is it otherwise? Investing in a device with a tired battery and a cracked back is a different proposition from one that is otherwise excellent.
How much does Face ID matter to you day to day? Some people barely notice using a passcode. Others rely on Face ID constantly for banking apps, Apple Pay and password autofill.
Is anything else wrong? A combined display and Face ID problem may be addressed in one visit, which changes the arithmetic.
What is the phone worth with the fault? Trade-in and resale values drop when Face ID does not work, and Apple notes that an Unknown part may affect trade-in value. That difference is part of the comparison.
Do you need a working passcode alternative for accessibility reasons? For some users, typing a passcode repeatedly is a genuine barrier rather than an inconvenience, which raises the priority of a fix.
We do not quote prices, timescales or success rates in articles like this, because the answer depends entirely on the model, the cause and what an inspection finds, and any figure given before that inspection would be a guess. What we can do is look at the phone, explain what has happened and set out the realistic options.
Frequently Asked Questions
1. Why has Face ID suddenly stopped working with no warning?
Sudden failures usually trace back to one of four things: something now covering the sensor, such as a new case or screen protector; an iOS update that has not gone cleanly; a change in how or where you are using the phone, such as bright sunlight or a different holding position; or a hardware fault, which is more likely if there was a recent drop, repair or water exposure. Working through cleaning, case removal, a restart and an iOS update in that order sorts most of them, and the ones that survive that list are worth having assessed.
2. What does “A Problem Was Detected with the TrueDepth Camera” actually mean?
It means Apple’s on-device diagnostics have identified a fault in the TrueDepth camera system and disabled Face ID. Apple explains that the camera contains lasers that may be disabled for safety reasons if the device malfunctions or is damaged. The advice is to update to the latest iOS version first, and if the message persists, service may be needed. It is not a message to try to bypass, because a safety mechanism has deliberately engaged.
3. Does replacing an iPhone screen always break Face ID?
No, and it is worth being clear about that. Screen replacement does not automatically disable Face ID, and many are carried out with no effect on it at all. The risk comes from the TrueDepth sensor assembly having to be transferred from the old display to the new one, which is delicate work. Damage during transfer, poor reseating, or substituting an assembly from another phone will break Face ID, but careful work does not.
4. Can Face ID be repaired if the TrueDepth camera is damaged?
It depends what is damaged. Where the original assembly is intact and the problem is a connection, a seating issue or damage from previous work, repair is often possible. Where the original components are destroyed, missing or heavily corroded, replacement parts from another iPhone will not work, because the system is cryptographically paired to your device’s Secure Enclave. That is why a proper diagnosis comes before any promise about the outcome.
5. Why does my iPhone ask for a passcode instead of using Face ID some mornings?
That is normal security behaviour rather than a fault. Apple requires a passcode after the device restarts, when it has not been unlocked for more than 48 hours, when the passcode has not been used for six and a half days and Face ID has not unlocked the phone in the last four hours, after a remote lock, after five failed Face ID attempts, and after Emergency SOS. A phone left untouched overnight or over a weekend often lands in one of those states.
6. Will a screen protector stop Face ID working?
Most will not. Problems come from protectors that overlap the sensor cutout, are misaligned by a couple of millimetres, carry a tint or coating across the top strip, are privacy filters, or have trapped dust and bubbles near the notch. If Face ID stopped working around the time a protector went on, remove it and test before looking anywhere else.
7. Face ID stopped after my iPhone got wet, but the phone seems fine otherwise. Why?
Because water damage is usually progressive rather than immediate. Liquid leaves residue on connectors and flex contacts, and corrosion develops over the following days and weeks, which is why Face ID can fail well after the soaking. Salt water, pool water and sugary drinks are more aggressive than clean water. If Face ID has gone after any liquid exposure, an early inspection is worthwhile, because corrosion spreads.
8. Is it safe to keep using my iPhone with Face ID disabled?
Yes, provided you keep a passcode. The device stays encrypted and secure, and you can unlock, pay and authenticate with the passcode. What is not safe is the shortcut some people take of removing the passcode for convenience, which removes meaningful protection from everything on the phone and stops Apple Pay working. Use a strong passcode and be careful about who can see you typing it in public.
9. Should I reset all settings to fix Face ID?
Only in specific circumstances. It can help where Face ID stopped after a software change and restarting, updating and re-enrolling have not worked. It will do nothing for a fault caused by a drop, water or a screen repair, and nothing for a TrueDepth diagnostic message. It also clears Wi-Fi passwords, Bluetooth pairings and a lot of other configuration, so it is not a free action. Back up first, and be sure you know your passcode and Apple Account details.
10. Do all recent iPhones have Face ID?
Almost all, with the SE range being the exception. Apple lists Face ID on the iPhone X, XR, XS and XS Max, the 11, 12, 13, 14, 15 and 16 families including the 16e, and the 17 family including the iPhone Air and the 17e, as well as the iPad Pro. The iPhone SE models use Touch ID instead, so there is no Face ID on those to troubleshoot.
11. My front camera and earpiece stopped working at the same time as Face ID. What does that mean?
It usually points to the shared sensor assembly at the top of the display, because the front camera, several Face ID components and, on many models, the earpiece region are grouped together. Multiple related failures at once actually help diagnosis, since they narrow the likely cause considerably. It also suggests a physical fault rather than a software one, so it is worth having looked at rather than continuing to troubleshoot at home.
12. Can I check whether my iPhone has had non-genuine parts fitted?
On iPhone 11 and later, excluding SE models, go to Settings > General > About and look for the Parts and Service History section. iOS reports parts as Genuine, Used or Unknown. It is particularly useful when buying second-hand, and it is worth knowing that an Unknown part may affect the trade-in value of the device.
Conclusion
Face ID problems look alarming and usually are not. The overwhelming majority come down to something covering the TrueDepth camera, an awkward holding position, a setting that was never switched on, or an iOS fault that a restart and an update will clear. Those cost you nothing but a few minutes.
The cases that matter are the ones with a physical cause behind them: a drop, a soaking, or a screen repair where the sensor assembly was disturbed. Those show a different pattern, often with the front camera or earpiece affected too, and they need proper diagnosis rather than another round of resets. The message about a problem being detected with the TrueDepth camera is the clearest signal of all that you have reached that point.
Whatever the cause, keep your passcode in place while you work through it. Convenience is worth having back, but not at the cost of the security the feature exists to provide.
iPhone Repairs in Telford, Oakengates and Broseley
If Face ID is still not working after the safe steps above, or it stopped after a repair, a drop or water, bring the phone in and we will take a proper look at it.
TF2 Smartphone Solutions repairs iPhones for customers across Telford, Oakengates, Broseley, Madeley, Wellington and the wider Shropshire area. We will go through the phone’s history with you, check the software state and Parts and Service History, test the related components, and explain what we find in plain language before anything is agreed. If Face ID cannot be restored, we will say so.
| Shop | Address |
|---|---|
| Oakengates | 47 Market Street, Oakengates, Telford, TF2 6EL |
| Broseley | 74 High Street, Broseley, TF12 5EX |
| Days | Opening hours |
|---|---|
| Monday to Saturday | 09:00 to 18:00 |
| Sunday | 10:00 to 17:00 |
Call in during opening hours, or get in touch with the TF2 Smartphone Solutions team first if you would like to describe the fault and what led up to it. Please back up your iPhone before any repair, and make sure you know your passcode and Apple Account details, since both are needed to test the device properly afterwards.
Sources
- Apple Support: If Face ID isn’t working on your iPhone or iPad Pro
- Apple Support: If an alert says Face ID has an issue on your iPhone or iPad Pro
- Apple Support: About Face ID advanced technology
- Apple Support: iPhone and iPad models that support Face ID
- Apple Support: About genuine iPhone displays
- iFixit: iOS 15.2 fixes the iPhone 13 Face ID screen repair issue