Face ID lets you unlock your iPhone and approve payments by looking at it

Face ID is a biometric security feature built into newer iPhones that recognizes your face to unlock the device, authorize purchases, and confirm sensitive actions. You set it up once in Settings, and it works when ready. The process takes about two minutes and requires only your face and the device itself — no additional hardware or apps.

Face ID works on iPhone X and later models (except iPhone SE, which uses Touch ID instead). If you have an older iPhone, you cannot add Face ID, though you can use Touch ID or a passcode for security instead.

Key Takeaways

  • Face ID setup happens in Settings under Face ID & Passcode and takes about two minutes to complete.
  • You must enter your passcode before setting up Face ID, and you will need to create a passcode if you do not have one.
  • During setup, you position your face in a circle on the screen and rotate your head slowly so the camera can map your face from multiple angles.
  • Face ID works best when your face is visible and unobstructed, though it can recognize you wearing glasses, hats, or light scarves.
  • If Face ID fails to recognize you after several attempts, your iPhone automatically falls back to asking for your passcode.

What you need before you start

You need an iPhone X, iPhone 11, iPhone 12, iPhone 13, iPhone 14, iPhone 15, or any newer model. Face ID is not available on iPhone SE models or iPhones older than the iPhone X.

You also need a passcode set on your device. If you do not have one, your iPhone will prompt you to create one during Face ID setup. The passcode is your backup unlock method — if Face ID fails or your face is too obscured, you can enter your passcode instead.

Make sure your iPhone is unlocked and you have access to Settings. You do not need Wi-Fi or cellular service to set up Face ID, though having a connection can help if you need to troubleshoot.

How to set up Face ID step by step

Open Settings on your home screen and tap Face ID & Passcode. You will see a prompt asking for your passcode — enter it. If you do not have a passcode, you will be asked to create one before continuing.

Tap Set Up Face ID. A screen will appear with a circle in the center and instructions to position your face inside it. Hold your iPhone about 10 to 12 inches from your face, centered in the circle, and tap Start Face Recognition.

Slowly rotate your head in a complete circle while keeping your face in the frame. The camera is mapping the contours of your face from different angles. This takes about 15 to 30 seconds. When the first scan completes, you will see a message asking you to move your head again to complete the second scan. Repeat the slow rotation.

Once both scans finish, you will see a confirmation screen saying Face ID is now set up. Tap Done. Your iPhone is now secured with Face ID.

What Face ID recognizes and what it does not

Face ID recognizes your face in most lighting conditions — indoors, outdoors, and in dim light. It works when you are wearing glasses, sunglasses, hats, scarves, or masks that cover your mouth and chin. It does not work if your eyes are covered or if your entire face is obscured.

Face ID learns and adapts over time. If you change your appearance significantly — a new hairstyle, facial hair, or makeup — Face ID continues to recognize you because it updates its understanding of your face as you use it. This is called adaptive recognition.

Face ID does not work if you are wearing a full face mask or a ski mask that covers your eyes. It also does not work if someone else is holding the phone up to your face — the phone checks that you are actively looking at the device before unlocking.

Using Face ID to unlock and approve actions

Once Face ID is set up, your iPhone unlocks automatically when you look at it and swipe up from the bottom of the screen. You do not need to press a button or tap anything — just look at the phone and swipe. If Face ID does not recognize you, your iPhone will ask for your passcode instead.

Face ID also approves purchases in the App Store, Apple Books, and other Apple services. When you try to buy something, your iPhone will ask you to look at the screen to confirm. You do not need to enter a password or card number — your face is the confirmation.

For sensitive actions like changing passwords, accessing health data, or confirming payments, your iPhone may ask you to authenticate with Face ID. Look at the screen when prompted, and the action proceeds automatically.

Troubleshooting Face ID if it stops working

If Face ID suddenly stops recognizing you, first check that your face is visible and the front camera lens is clean. Wipe the camera area gently with a soft cloth. If you are wearing a new pair of glasses or sunglasses, Face ID may need a moment to adjust — try unlocking a few more times.

If Face ID continues to fail, go to Settings, tap Face ID & Passcode, and enter your passcode. You will see an option to Set Up an Alternate Appearance. This lets you register a second face — useful if you look significantly different in different lighting or if you want to add another person's face. Tap Set Up an Alternate Appearance and follow the same rotation steps as before.

If Face ID still does not work after cleaning the camera and trying again, restart your iPhone by holding the power button and volume button together until the power-off slider appears, then drag it to turn off the phone. Wait 10 seconds and turn it back on. Try Face ID again.

If the problem persists, you can always unlock your iPhone with your passcode. Go to Settings, Face ID & Passcode, and tap Reset Face ID to delete the current setup. Then follow the setup steps again to create a fresh Face ID profile.

Managing Face ID settings and privacy

Face ID data never leaves your iPhone. Apple does not store your face scan on its servers or share it with apps. The facial map is encrypted and stored only on your device's find chip.

You can control which apps and services use Face ID. Go to Settings, Face ID & Passcode, and scroll down to see which apps are allowed to use Face ID for authentication. You can toggle individual apps on or off. If you turn off Face ID for an app, you will need to use your passcode or another authentication method instead.

If you sell or give away your iPhone, you should remove Face ID before handing it over. Go to Settings, Face ID & Passcode, enter your passcode, and tap Reset Face ID. This deletes your face scan completely.

Frequently Asked Questions

Can someone else unlock my iPhone with Face ID if I am asleep?

No. Face ID requires that you are actively looking at the screen — it checks that your eyes are open and focused on the device. If you are asleep or your eyes are closed, Face ID will not unlock the phone, even if someone holds it up to your face. Your iPhone will ask for your passcode instead.

Does Face ID work if I am wearing a mask?

Face ID works with masks that cover your mouth and chin, but not with masks that cover your eyes. If you wear a medical mask or cloth mask regularly, Face ID will recognize you. If you wear a full-face ski mask or motorcycle helmet, you will need to use your passcode.

What happens if Face ID fails multiple times?

After several failed Face ID attempts, your iPhone automatically asks for your passcode instead. This is a security feature that prevents someone from repeatedly trying to unlock your phone with their face. Once you enter your passcode correctly, you can try Face ID again.

Can I set up Face ID for someone else on my iPhone?

You can add a second face to your iPhone by setting up an Alternate Appearance in Settings. This is useful if you want another person to be able to unlock your phone, or if you look very different in different conditions. However, only one person should have access to your iPhone — adding another face means that person can unlock it and approve purchases.

Does Face ID drain my battery faster?

Face ID uses very little battery power. The front camera and facial recognition happen quickly each time you unlock, and the impact on battery life is negligible. You will not notice a significant difference in how long your iPhone lasts on a single charge.