A cracked screen grabs your attention the moment you drop your phone. But here’s the thing: the damage can run deeper. The True Depth camera system — the tech that powers Face ID and selfies — sits behind the glass and can be affected even when the crack looks minor.

How to tell if the True Depth is playing up
If Face ID starts failing, that’s the obvious sign. Tap to unlock and it asks for your passcode more often. More subtle clues exist too. Selfie images may look off; colours might shift or focus might be slower. The front camera can sometimes produce a faint haze or small black spots that weren’t there before. Sometimes everything seems fine until certain angles or lighting reveal a problem.

Don’t assume the worst
Let’s be honest, not every crack kills the True Depth. A tiny chip in the corner often leaves the camera untouched. But water and grit can creep in through hairline fractures, causing corrosion or sensor misalignment over time. I’ve seen phones that looked salvageable on the surface but had hidden damage that made Face ID unreliable.

Why the True Depth matters
Face ID isn’t just a snazzy unlock method; it secures your banking apps, passwords and private messages. If the True Depth system fails, those conveniences vanish and, depending on your settings, your phone might repeatedly request passcodes or display warnings. That extra inconvenience quickly becomes a daily annoyance.

Quick checks you can run
First, try setting up an alternate appearance in Face ID settings — if it won’t let you, that’s not a great sign. Test the front camera in different lighting. Use the Notes app to make a quick Face ID test (lock and unlock). If you see irregularities, back up your data straight away. Don’t risk losing photos you can’t replace.

Repair options and realities
You can often replace the screen and restore the True Depth to full function — but it depends. If the sensor assembly or wiring is damaged, repairs are more complex and pricier. I recommend a diagnostic from a reputable shop. We repair dozens of these screens and can usually tell quickly whether the True Depth survived the tumble.

When to consider replacement
If diagnostics show severe sensor damage or repeated failures after repair, it might be time to weigh up repair cost versus replacement. For older models, a new phone could be more economical. For newer devices, a professional repair often makes sense.

Final thoughts
A cracked screen is more than an eyesore. It can be a stealthy threat to the True Depth camera and the security it provides. Back up your data, run a few checks, and get a professional opinion. That extra battery might just get you from a full day in Shoreditch back to Wimbledon without the low-power panic, but a working True Depth keeps your phone both useful and secure. If you’re unsure, bring it in and we’ll run a quick diagnostic to reassure you promptly.