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Face ID Not Working on iPhone: What to Check and How to Fix It

October 15, 2026 · Marion Phone Repair

Face ID problems fall into two groups. Either it works sometimes but fails often, which is usually a setting, an obstruction, or the way you hold the phone, or the iPhone says Face ID is not available or A problem was detected with the TrueDepth camera, which usually points to hardware. Start with the quick checks; they solve most of the first group.

1. Clean the TrueDepth camera area

Face ID uses a cluster of sensors in the notch or Dynamic Island at the top of the screen, including an infrared projector and camera. Smudges, dust, or makeup residue on that area reduce accuracy. Wipe it with a soft, lint-free cloth.

Check your screen protector and case too. A protector with a cutout or tint over the sensors, a bubble at the top, or a case lip that covers the edge can block Face ID. Remove the case and test again.

2. Check how you are holding the phone

• Hold the iPhone about 10 to 20 inches from your face.
• Make sure your eyes, nose, and mouth are visible to the camera. Face ID works in portrait orientation on all models and in landscape on iPhone 13 and later running iOS 16 or later.
• Sunglasses that block infrared light can stop Face ID even if you can see through them.
• If you often wear a mask, iPhone 12 and later support Face ID with a Mask in Settings.

3. Check the Face ID settings

Open Settings > Face ID & Passcode and enter your passcode.

• Make sure the features you expect, such as iPhone Unlock, Apple Pay, and Password AutoFill, are turned on.
• Require Attention for Face ID means your eyes must be open and looking at the phone. That is a good security setting, but it can cause failures if you look away or have certain eye conditions. It can be turned off under Accessibility.
• If one app will not use Face ID, check Other Apps in the same screen and make sure that app is allowed.

4. Restart and update

Restart the iPhone, then enter your passcode when asked; Face ID always needs the passcode after a restart. Then check Settings > General > Software Update. Face ID bugs are occasionally fixed in iOS updates.

5. Set up an alternate appearance

If you look noticeably different at times, for example with or without glasses, a beard, or work gear, go to Settings > Face ID & Passcode > Set Up an Alternate Appearance and scan again in that look.

6. Reset Face ID and set it up again

In Settings > Face ID & Passcode, select Reset Face ID, then Set Up Face ID. Do the scan in good lighting, holding the phone at a normal distance, and move your head slowly in a full circle as prompted. A fresh scan often fixes gradual decline in recognition.

When it is hardware

These messages or behaviors usually mean a hardware fault:

• Face ID is not available. Try setting up Face ID later.
• A problem was detected with the TrueDepth camera. Face ID has been disabled.
• The setup screen will not complete the scan at all.
• Portrait mode on the front camera, or Animoji, stops working at the same time.

The most common causes are a drop or impact, water exposure, or a previous screen replacement where the front sensor parts were damaged or disturbed. Face ID components are paired to the phone's logic board, so they cannot simply be swapped with a part from another iPhone. Repairs need either genuine Apple parts installed with Apple's process, or careful repair of the original components.

After a screen replacement

If Face ID stopped working right after a screen was replaced, the flex cable connecting the front sensors may have been damaged or not reconnected, or the flood illuminator on the earpiece assembly may not have been transferred correctly. That is worth raising with whoever did the repair. On newer iOS versions, Settings may also show a Parts and Service History section under General > About listing which parts were replaced.

Things not to do

• Do not keep a damaged screen protector on just because Face ID mostly works; it can hide the real fault.
• Do not open the phone to reseat connectors yourself. The Face ID components are delicate, and damaging the projector permanently disables Face ID.
• Do not restore the phone hoping it fixes a hardware message. Back up first if you do try a restore.

Help from Marion Phone Repair

If Face ID stopped after a drop, water exposure, or an earlier repair, Marion Phone Repair can inspect the TrueDepth components and explain honestly whether it can be repaired. We check Face ID before and after any screen repair so you know it works before you leave.

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