Face ID Not Working After a Drop: Causes and Fixes

How Face ID works, and why drops affect it

Face ID relies on the TrueDepth camera system, a cluster of sensors in the notch or Dynamic Island at the top of your iPhone's screen. A dot projector beams thousands of invisible infrared dots onto your face, a flood illuminator lights your face with infrared light, and an infrared camera reads the result. A proximity sensor and the front camera sit nearby.

These parts are small, precisely aligned and sensitive to shock. A hard drop can knock one out of alignment, crack a sensor, or damage the tiny cables that connect them. But not every Face ID failure after a drop is a hardware fault, so start with the simple checks.

Step-by-step fixes to try first

1. Clean the top of the screen. Wipe the notch or Dynamic Island area with a soft, lint-free cloth. Smudges, makeup and dust can block the sensors.
2. Check your screen protector and case. A cracked protector over the sensors, or a case that covers the top edge, can stop Face ID. Remove them and try again.
3. Look at the glass. If the screen is cracked right over the sensors, the cracks themselves can scatter the infrared light.
4. Restart the iPhone. A restart clears temporary glitches, especially if Face ID stopped working without a visible message.
5. Update iOS. Go to Settings › General › Software Update and install any available update.
6. Check Face ID settings. In Settings › Face ID & Passcode, make sure Face ID is turned on for iPhone Unlock and the other features you use.
7. Reset Face ID and set it up again. In the same menu, tap Reset Face ID, then set it up again in good lighting, holding the phone at a comfortable distance in front of your face.

If Face ID works again after one of these steps, keep an eye on it for a few days. Intermittent failures can be an early sign of hardware damage.

What the error messages mean

If you see one of the hardware messages even after a restart, update and reset, the problem is very likely physical.

Being honest about Face ID repairs

Face ID is one of the more complex things to repair on an iPhone, and it's worth knowing why before you book.

• Parts are matched to the phone. Apple pairs key Face ID components with the iPhone's logic board at the factory. The dot projector in particular can't simply be swapped for a generic replacement.
• Some faults are fixable, others aren't. A damaged cable, a loose connection or a part sitting out of place can sometimes be addressed. A failed dot projector is a different story, and some Face ID faults can only be fully restored by Apple.
• Screen repairs need care. On some iPhone models, parts involved in Face ID are attached to a small cable at the top of the screen and must be moved over carefully to the new display during a screen replacement.

A good technician will tell you what she thinks is wrong, what can realistically be done and what can't, before any work starts. If Face ID can't be restored, your iPhone will still work normally with your passcode. Our iPhone repair guide walks through the most common iPhone repairs and what to expect from each.

Living with it in the meantime

• Use your passcode to unlock, and pick a strong one you won't forget.
• Apple Pay and app logins will ask for your passcode instead of Face ID.
• Avoid more drops; a case with a raised lip protects the top edge.
• If the screen is cracked near the sensors, cover it with a protector to keep dust out.

When to call a technician

If Face ID stopped after a drop and none of the steps above helped, it's time for a proper diagnosis. Woman Wireless On The Go can inspect your iPhone at your home or workplace and give you an honest free quote before any work starts, including when a fault is one only Apple can fully fix. See our iPhone repair service and the areas we cover, then call or WhatsApp (365) 351-4247.

Frequently asked questions

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