Face ID Stopped Working? The Fixes That Actually Matter

Face ID usually works so quickly that you barely think about it.

You lift the iPhone, look at the screen and it unlocks.

Then suddenly it starts asking for the passcode.

Perhaps it fails several times before recognising you, works for unlocking but not in a banking app, or displays:

Face ID is not available

or:

A problem was detected with the TrueDepth camera

Those symptoms do not all mean the same thing.

The easiest way to troubleshoot Face ID is to answer one question first:

Can Face ID still recognise or enrol a face at all?

If yes, start with positioning, settings and software.

If Face ID cannot be set up—or iOS specifically reports a TrueDepth camera problem—hardware or repair calibration becomes much more likely.

First: Being Asked for the Passcode Can Be Normal

An iPhone sometimes requires your passcode even when Face ID is functioning perfectly.

For example, that can happen after:

restarting the iPhone

certain security events

repeated failed Face ID attempts

So if Face ID suddenly asks for your passcode once:

1. Enter the passcode.

2. Lock the iPhone.

3. Try Face ID again.

If it immediately works normally afterwards, there may be nothing to repair.

Step 1: Read the Exact Message

The wording matters.

Face ID occasionally fails to recognise you

Start with:

sensor visibility

positioning

glasses

settings

Face ID works for unlocking but not one app

Start with that app and its Face ID permissions.

Face ID cannot be set up

More concerning.

“A problem was detected with the TrueDepth camera”

Strongly consider:

hardware fault

incomplete repair

calibration problem

Face ID stopped immediately after a drop or repair

Hardware becomes much more likely than an iOS setting.

The current Hamilton Group article already makes this distinction correctly; I would simply move it much closer to the beginning.

Step 2: Clean the Entire TrueDepth Area

Face ID does not rely only on the visible selfie camera.

The TrueDepth system uses several components around the top of the display.

Gently clean the entire area using a:

soft, dry, lint-free cloth.

Remove:

fingerprints

grease

dust

makeup

moisture

Apple specifically recommends checking that nothing is covering the TrueDepth camera, including dirt, a case or screen protector.

A selfie can still look perfectly normal even when part of the TrueDepth system is obstructed.

Step 3: Remove the Case or Screen Protector Temporarily

This is particularly worth testing when Face ID became unreliable after:

installing a new protector

replacing a cracked protector

changing cases

having the display repaired

A badly aligned protector can cover part of the sensor area.

Remove the obstruction temporarily and test Face ID before buying anything else.

If Face ID immediately works normally:

the accessory is the problem.

A properly fitted protector designed for the exact iPhone model should not normally interfere.

Step 4: Make Sure Face ID Can Actually See You

Apple says your:

eyes, nose and mouth

normally need to be visible to the TrueDepth camera.

Possible problems include:

scarf

hair

hand

helmet

low hat

mask

some sunglasses

Apple says many sunglasses work, but lenses that block certain types of infrared light can prevent Face ID from functioning.

The quickest test is:

remove the sunglasses and try again.

If Face ID now works every time, the phone is probably fine.

Step 5: Hold the iPhone at a Normal Distance

Apple recommends roughly:

25–50 cm

between your face and the TrueDepth camera.

Face ID can struggle when the phone is:

extremely close

too far away

lying flat on a low desk

held at a severe angle

partly covered by your hand

For troubleshooting:

1. Hold the iPhone upright.

2. Keep it around normal reading distance.

3. Look directly at the screen.

Remove awkward positioning from the equation.

Step 6: Test in Portrait Orientation First

Face ID can work in both portrait and landscape on iPhone 13 models and later with iOS 16 or later.

Earlier Face ID iPhones generally require portrait orientation.

Apple also says Face ID with a Mask works in portrait orientation, not landscape.

So when troubleshooting:

start in portrait.

If that works reliably, experiment with the other orientation afterwards.

Step 7: Check Face ID Settings

Open:

Settings > Face ID & Passcode

Enter the passcode.

Make sure Face ID is enabled for the feature you are trying to use.

Options can include:

iPhone Unlock

Wallet & Apple Pay

Password AutoFill

App Store purchases

Other Apps

If Face ID unlocks the phone but one application keeps requesting a password, the TrueDepth hardware is probably not the first place to look.

Check:

Settings > Face ID & Passcode > Other Apps

Then also check the app itself.

Some banking and security apps require you to sign in manually again after:

password change

app update

device restore

security-policy change

Step 8: Restart the iPhone

This remains one of Apple’s recommended troubleshooting steps.

Restart normally.

After the iPhone powers back on, you must enter the passcode once before Face ID can unlock it.

Then lock the phone and try Face ID again.

If the problem was a temporary iOS or camera-service issue, that may be enough.

Step 9: Update iOS

Open:

Settings > General > Software Update

Install the latest compatible stable release.

Apple currently includes updating iOS or iPadOS as one of the first troubleshooting steps when Face ID stops working.

This is especially worthwhile if the problem:

began after an earlier software update

only affects certain applications

is intermittent

Back up important data before significant software changes.

Step 10: Understand “Require Attention”

Face ID can require that your eyes are:

open

directed towards the device

This provides an additional security safeguard.

You can review settings under:

Settings > Face ID & Passcode

including:

Require Attention for Face ID

Apple’s July 2026 guidance confirms that Attention Aware functionality continues to use the TrueDepth camera to determine whether you are looking at the device.

I would not recommend switching Require Attention off simply because Face ID failed a few times.

First test:

without sunglasses

with both eyes clearly visible

at the correct position

Disabling an additional security control should not be the default fix for poor positioning.

Step 11: Add an Alternative Appearance

Face ID continuously adapts to gradual changes in your appearance.

But if your appearance sometimes changes substantially, Apple supports an:

Alternative Appearance

under:

Settings > Face ID & Passcode > Set Up an Alternative Appearance.

This can help with significant changes involving:

glasses

facial hair

work equipment

specialised clothing

Do not use it casually to register another person unless you are comfortable with that person potentially being able to authenticate as you.

Step 12: Reset Face ID

If Face ID still recognises badly despite:

clean sensors

correct positioning

correct settings

restart

current iOS

reset the facial enrolment.

Open:

Settings > Face ID & Passcode > Reset Face ID

Then choose:

Set Up Face ID

Apple recommends this after the simpler checks fail.

During setup:

remove sunglasses

remove masks where possible

hold the phone naturally

keep the TrueDepth area clear

If enrolment completes successfully and Face ID now works consistently, the old facial profile may simply have become problematic.

The Important Test: Can You Set Face ID Up Again?

This is the point where the diagnosis changes.

Reset succeeds

Hardware is at least functioning well enough to complete enrolment.

Continue investigating recognition conditions if needed.

Setup repeatedly fails

That is much more suspicious.

Apple says service may be necessary when the camera is not working and Face ID cannot be set up.

Repeatedly:

restarting

resetting Face ID

reinstalling apps

is unlikely to repair damaged TrueDepth hardware.

The Front Camera Can Work While Face ID Is Broken

This catches people out.

You open the Camera app.

Selfies look perfect.

So you assume:

“The camera can't be faulty.”

But Face ID uses more than the ordinary front-facing camera.

The TrueDepth system includes depth- and infrared-related components.

That means:

normal selfie camera ≠ proof that Face ID hardware is healthy.

Apple’s current front-camera documentation confirms that the TrueDepth camera enables Face ID and other depth-aware features.

So if:

selfies work

but:

Face ID setup fails with a TrueDepth message

treat the TrueDepth error seriously.

Face ID Stopped After a Drop

If the problem began immediately after:

impact

cracked display

bending

liquid exposure

software becomes a less convincing explanation.

A physical incident can affect the TrueDepth assembly or its connections.

You can still try:

restart

update

reset Face ID

but don't keep erasing or resetting the phone indefinitely if iOS specifically identifies a TrueDepth fault.

At that point, inspection is more appropriate.

Face ID Stopped After a Screen or Camera Repair

This deserves particular emphasis in 2026.

Open:

Settings > General > About

Look for:

Parts and Service History

on supported iPhones.

Apple’s July 2026 documentation says iPhone 12 models and later can display service-history information for the front camera. Depending on the repair, you may see statuses such as:

Genuine

Used

Unknown

Finish Repair.

This can be extremely useful if Face ID broke immediately after repair.

“Finish Repair” Can Explain Face ID Failure

Apple’s current documentation makes this much more important than older Face ID guides suggest.

After a replacement TrueDepth camera is installed, Parts and Service History can show “Finish Repair” until the calibration process has been completed with Repair Assistant. Apple says Face ID may not be available for unlocking, payments or app authentication until the required calibration is finished.

So if Face ID stopped after a recent front-camera repair:

check calibration status before assuming the new camera is defective.

Reused Genuine Cameras Are Now More Nuanced

Another useful 2026 update:

Apple says iPhone 16 models and later can support a front camera previously used in another iPhone of the same model, provided the repair and calibration process is completed correctly. It can then appear as Used in Parts and Service History.

That means an article should no longer imply:

“Any swapped TrueDepth/front-camera component automatically means Face ID can never work.”

The modern answer depends on:

iPhone model

component

repair process

calibration completion

This is one of the strongest reasons to update the existing article.

What Does “Unknown” Mean?

Apple says an Unknown message can appear when a part:

is not genuine

is not functioning as expected

has not been properly verified/linked

has been modified

has an incomplete installation.

An Unknown or Face ID Issue message after a recent repair deserves follow-up with the repair provider.

Do Not Attempt DIY TrueDepth Repairs Casually

Apple specifically warns that the TrueDepth camera system includes laser components and should be serviced properly.

Improper modification or unsuitable parts can affect both functionality and safety.

So I would remove any implication that somebody should start:

reseating TrueDepth cables

swapping dot projectors

heating sensor assemblies

experimenting with programming tools

as ordinary consumer troubleshooting.

Once the fault clearly reaches TrueDepth hardware, it has moved out of the settings menu.

Face ID Works Everywhere Except Apple Pay

Do not reset Face ID immediately.

Open:

Settings > Face ID & Passcode

Confirm:

Wallet & Apple Pay

is enabled.

Also check:

payment cards remain active

Wallet itself works

passcode is enabled

no business management policy is affecting Wallet

If Face ID unlocks the iPhone normally, the facial recognition system is clearly capable of authenticating you.

Focus on Wallet first.

Face ID Works Everywhere Except One App

Again, this is probably not a TrueDepth hardware failure.

Check:

Settings > Face ID & Passcode > Other Apps

Then open the affected app and sign in using the normal password.

Many banking or security applications require biometric login to be explicitly re-enabled after security-sensitive changes.

Face ID Fails Only With Sunglasses

Remove them and test.

Apple says some sunglasses block the infrared light required by the TrueDepth system.

If Face ID works perfectly without them:

nothing necessarily needs repairing.

Face ID Fails Only in Bed

This is usually much simpler than it sounds.

Possible causes:

one eye closed

pillow covering part of face

phone too close

phone lying flat

extreme viewing angle

Lift the iPhone into a normal viewing position and retest.

Do not weaken attention/security settings merely to accommodate an awkward angle.

What Will Not Usually Fix Face ID

I would remove a lot of the existing article’s repetition and keep this short.

These are rarely sensible primary fixes:

resetting network settings

repeatedly force-closing every app

installing third-party “camera repair” apps

repeatedly factory-resetting the iPhone

blindly replacing screen protectors without testing

repeatedly resetting Face ID when setup itself reports hardware failure

Face ID recognition does not depend on Wi-Fi or mobile data.

And software cannot repair physically damaged TrueDepth components.

When Service Is the Sensible Next Step

Arrange professional diagnosis when:

A problem was detected with the TrueDepth camera appears

Face ID reports that it has been disabled

Face ID setup cannot complete

the fault began immediately after physical damage

it began after a screen/front-camera repair

Parts and Service History reports an issue

Finish Repair remains after a component replacement

restarting, updating and resetting Face ID do not restore enrolment

Apple’s own Face ID troubleshooting guidance says service may be required when the camera is not working and Face ID cannot be set up.

Before service, make sure important data is backed up.

The Fast Face ID Troubleshooting Order

Use this sequence:

1. Enter the passcode once and retry Face ID.

2. Read the exact error message.

3. Clean the entire TrueDepth area.

4. Remove the case or screen protector temporarily.

5. Remove sunglasses and make sure your face is visible.

6. Hold the phone around 25–50 cm away.

7. Test in portrait orientation.

8. Check Face ID & Passcode settings.

9. Restart the iPhone.

10. Update iOS.

11. Add an Alternative Appearance if genuinely needed.

12. Reset and re-enrol Face ID.

13. If enrolment fails, check for damage or previous repair.

14. Check Parts and Service History.

15. Complete Finish Repair/Repair Assistant where applicable.

16. Arrange trained service if TrueDepth errors remain.

The key principle is:

Recognition problems are often settings or positioning. Enrolment failure and explicit TrueDepth errors are much stronger evidence of hardware or repair-calibration trouble.

How Hamilton Group Can Help

Hamilton Group can help businesses and Apple users distinguish a simple Face ID configuration issue from a device that genuinely needs hardware attention.

We can help with:

iPhone troubleshooting

Face ID problems

iOS updates

business Apple devices

device-management issues

repair and replacement decisions

data protection before service

For company-owned devices, we can also help determine whether repeated device issues justify repair or replacement and make sure business data is protected before a handset is sent away.

Visit hgmssp.com or call 0330 043 0069.