TecnoOrange 
I’ve been using Face ID on my iPhone since it launched and it’s one of those features you can’t go back from once you try it. Apple’s facial recognition not only unlocks your phone but protects your banking apps, passwords, and payments. If you want to know how to set up Face ID on iPhone for better security, here’s the complete guide.
Table of contents
Table of contents
What is Face ID and how does it work
Face ID is Apple’s facial recognition system used to authenticate users on the iPhone. Unlike simple facial recognition systems on other phones that use the normal front camera, Face ID uses a TrueDepth system with over 30,000 invisible infrared light points to create a precise 3D map of your face.
The technology behind it
The TrueDepth system projects over 30,000 infrared light points onto your face and an infrared camera reads the resulting pattern. This 3D depth map is combined with an infrared image and processed in the iPhone’s Secure Enclave, a processor dedicated exclusively to security.
What makes Face ID especially secure is that it can’t be fooled with photos, masks, or videos. The system detects the real depth of your face, not just a 2D image. It even works in complete darkness thanks to infrared technology.
Comparison with Touch ID
Face ID is statistically more secure than Touch ID. While Touch ID has a 1 in 50,000 chance that someone else could unlock your phone with their fingerprint, Face ID has a 1 in 1,000,000 chance. It’s 20 times more secure.
Pro-tip: Face ID learns and improves with use. If at first it doesn’t recognize you well with new glasses or a different hairstyle, use your passcode to unlock and the system will update your facial profile automatically.
How to set up Face ID for the first time
Let’s go through the concrete steps to set up Face ID on your iPhone. The process is simple and takes less than a minute.
During initial setup
When you turn on a new iPhone, the setup assistant will ask you to configure Face ID. Simply follow the on-screen instructions: place your face inside the circle and slowly move your head in a full circle. The system will capture several angles of your face.
Set up Face ID later
If you didn’t set it up during installation or want to reconfigure it:
- Open Settings on your iPhone
- Go to Face ID & Passcode
- Enter your passcode
- Tap “Set up Face ID”
- Place your face in front of the iPhone
- Slowly move your head in a circle following the instructions
- Repeat the process a second time when prompted
- Face ID is ready to use
Set up alternate appearance
If you frequently wear glasses, have a beard that changes style, or wear facial accessories, you can set up an alternate appearance:
- Go to Settings > Face ID & Passcode
- Tap “Set Up an Alternate Appearance”
- Repeat the setup process with your usual look
What Face ID can protect
Face ID on iPhone doesn’t just unlock your screen. It can protect practically anything sensitive on your device.
iPhone unlocking
The most basic function. When you raise your phone or tap the screen, Face ID recognizes you and automatically unlocks. It’s so fast you sometimes don’t even notice.
Apple Pay and payments
When you make an Apple Pay payment, Face ID verifies your identity before processing the transaction. Without your face, nobody can use your card. This makes mobile payment more secure than physical card payment.
Banking apps
Bank apps can use Face ID to authenticate logins and transfers. Instead of entering your bank PIN each time, you simply look at your phone and the app unlocks.
Passwords and iCloud Keychain
When the system needs to auto-fill a password or access your saved credentials, Face ID verifies it’s you. It’s more secure and convenient than typing passwords manually.
Sensitive notifications
You can configure it so notification content is only visible when Face ID recognizes you. This way nobody can read your messages if you leave your phone on the table.
| Function | How it protects | Security level |
|---|---|---|
| Phone unlock | Verifies face when turning on | High |
| Apple Pay | Verifies before each payment | Very high |
| Banking apps | Verifies when opening app | High |
| Passwords | Verifies when accessing | Very high |
| Notifications | Hides content until verified | Medium |
Recommended security settings for Face ID
To get the most out of Face ID for better security, there are several settings you should configure.
Require attention for Face ID
This setting (enabled by default) requires you to be looking directly at the iPhone for Face ID to work. If someone tries to unlock your phone while you’re asleep with your face in front of the screen, it won’t work because your eyes are closed.
To verify it’s enabled: Settings > Face ID & Passcode > Require Attention for Face ID.
Disable lock screen access
You can decide which functions are accessible from the lock screen without unlocking the phone. I recommend disabling Control Center, Siri, and Wallet from the lock screen. This way a thief can’t activate airplane mode or access functions without your face.
Set a strong passcode
Face ID has passcode as backup. If it fails 5 times in a row, it asks for the passcode. Make sure your passcode is at least 6 digits and isn’t something obvious like 123456 or your birthday.
Enable data erase
In Settings > Face ID & Passcode you can enable “Erase Data” which deletes all content after 10 failed passcode attempts. Last line of defense if your phone is stolen.
Pro-tip: Always enable “Require Attention.” It’s an extra security layer that doesn’t affect convenience at all but protects against unlock attempts when you’re not looking.
Common Face ID troubleshooting
Sometimes Face ID doesn’t work as expected. These are the most common problems and their solutions.
Face ID doesn’t recognize my face
If you just changed your hairstyle, got new glasses, or significantly changed your appearance, Face ID might fail. Use your passcode to unlock and the system will update your facial profile. If it still doesn’t work, reconfigure Face ID from scratch.
Face ID doesn’t work with a mask
Since iOS 15.4, Face ID works with a mask using the eye area and face outline. To enable it go to Settings > Face ID & Passcode > Face ID with a Mask. Keep in mind it’s somewhat less secure than full Face ID.
Face ID fails often
If Face ID fails frequently, check that the TrueDepth camera isn’t dirty or covered by a poorly placed screen protector. Clean the top of the iPhone where the sensors are.
Face ID doesn’t work after an update
After an iOS update, Face ID may ask you to reconfigure it. This is normal and is a security measure. Simply go through the setup process again.
Face ID vs other security options
Let’s see how Face ID compares with other ways to unlock and protect your iPhone.
Face ID vs Touch ID
- Face ID: more secure (1/1,000,000 vs 1/50,000), works without touching, in complete darkness
- Touch ID: works with gloves, faster in some cases, doesn’t depend on phone position
Face ID vs passcode
- Face ID: instant, convenient, secure
- Passcode: slower, can be observed, but always works (doesn’t depend on sensors)
Face ID vs Android facial recognition
Most Android facial recognition systems use the 2D front camera, which is much less secure. It can be fooled with a photo. Face ID uses an infrared 3D map that’s impossible to fake with an image.
| System | Security | Speed | Convenience |
|---|---|---|---|
| Face ID (iPhone) | 1/1,000,000 | Very fast | Excellent |
| Touch ID (iPhone) | 1/50,000 | Fast | Very good |
| 2D recognition (Android) | Variable | Fast | Good |
| 6-digit code | High | Slow | Fair |
| Android fingerprint | 1/50,000 | Fast | Very good |
Security mistakes you should avoid
Even with Face ID configured, there are mistakes that can compromise your security.
Using a weak passcode
Face ID uses the passcode as backup. If your passcode is 0000 or 123456, the entire security system is weakened. Use at least a 6-digit passcode that isn’t predictable.
Sharing Face ID with someone
Face ID only allows one registered face (plus one alternate appearance). Don’t try to register someone else’s face as an alternate appearance. This reduces security and isn’t the intended use.
Disabling “Require Attention”
Some users disable this option thinking Face ID is faster without it. The speed difference is minimal and the security loss is big. Keep it enabled.
Not using Face ID for banking apps
Many people use PIN for their bank app instead of Face ID out of laziness. Setting up Face ID in banking apps takes 30 seconds and greatly improves security.
FAQ: Frequently asked questions
Can someone unlock my iPhone with a photo of me?
No. Face ID uses an infrared 3D map that can’t be fooled by photos, videos, or masks. It needs the real depth of your face.
Does Face ID work with sunglasses?
Depends on the glasses. If they block infrared light, Face ID might fail. Most normal sunglasses allow enough infrared light through to work.
Can I use Face ID for multiple accounts on the same iPhone?
No. Face ID only works with the registered face of the iPhone owner. Secondary accounts (like child focus mode) don’t use Face ID.
What if Face ID stops working permanently?
If the TrueDepth sensor is damaged, Face ID will stop working. Apple can repair it at an authorized center. In the meantime, you’ll use the passcode as your main authentication method.
Conclusion
Setting up Face ID on iPhone for better security is one of the best decisions you can make with your device. It’s fast, convenient, and extremely secure. Enable the attention feature, set a strong passcode, and use Face ID in all your sensitive apps. In less than a minute you’ll have protection that a thief or curious person can’t easily bypass. Your iPhone and your data will be much more secure.