What Is Face ID on iPhone and How to Use It Properly

Samuel Spenser publicado em abril 30, 2026Desbloquear iOSLeitura de 3 minutos

ID de rosto refers to Apple's advanced facial recognition-based biometric system. When releasing the iPhone X, Apple added this system to iOS devices. It works through the hardware and software. It allows users to unlock their devices without frequently entering passcodes. By default, this system is disabled, and you must set it up correctly. This comprehensive guide explains Face ID and helps you to use it on your Apple device and other services.

Part 1. What Is Face ID

According to Wikipedia, Face ID is a biometric authentication facial-recognition system designed and developed by Apple for iPhone and iPad Pro. It can be used for unlocking an iOS device, making payments, accessing sensitive data, and more. This system was released in 2017 with the iPhone X. Since then, it has been updated and introduced to all iPhones outside of SE models and iPad Pro models from 2018 onwards. Since iOS 18, users can use Face ID on apps.

How does Face ID work? It works through both hardware and software. The TrueDepth camera is equipped on the top of your device, which consists of a sensor with three modules: a laser dot projector, a module called the flood illuminator, and an infrared camera. The laser dot projector projects more than 30,000 infrared dots onto the user's face. The TrueDepth camera scans the face and creates a 3D map of unique facial identity.

Advantages of Face ID

• 1.Face ID is fast, secure, and easy to use once set up.
• 2.You can use Face ID for iPhone unlock, App Store, payments, autofill, and apps.
• 3.You can frequently reset and set up Face ID.
• 4.Maximize the machine learning via the Neural Engine.

Disadvantages of Face ID

• 1.Face ID cannot recognize your face due to blocks, like hats.
• 2.It cannot identify twins or close relatives.
• 3.No laws prevent other parties from forcing individuals to access their devices.
• 4.Privacy concerns.

Does Face ID work in the dark? Yes. Unlike traditional facial recognition systems, Apple's Face ID uses infrared light and a sophisticated dot projector to scan your face in three dimensions. That enables secure and reliable authentication even in dark environments.

Does Face ID work with eyes closed? No, Face ID won't work when your eyes are closed. Eyes play a key role in Face ID's functionality. When you turn on Face ID, the system scans a detailed image of your eyes, including the shape, color, and distance.

Is Face ID safe? This system offers fast and secure phone unlocking, but it is not perfect if you are concerned about your privacy. According to the new regulations, face scans can be used against you, while passcodes cannot.

iPhone and iPad with Face ID

iPhone X and above, except iPhone SE models

iPad Pro 11-inch(1st to 4th)

iPad Pro 12.9-inch(3rd to 6th)

iPad Pro 11-inch(M4 and M5)

iPad Pro 13-inch(M4 and M5)

Face ID vs Passcode

Both Face ID and passcode are essential security measures for Apple mobile devices. However, they work differently. Face IDs are biometric IDs. Even if you use Face ID to unlock your device, you must set a digit passcode. Both of them are secure and able to protect your device from unauthorized access. However, in some cases, you can only unlock your iPhone or iPad with your passcode:

• 1.Your device has been turned on or restarted.
• 2.Your iPhone or iPad hasn't been unlocked for over 48 hours.
• 3.Your device has just been charged.
• 4.Your device has been locked remotely.
• 5.The passcode hasn't been used to unlock your device in the last six and a half days.
• 6.Your Face ID hasn't unlocked the device in the last 4 hours.
• 7.After five unsuccessful attempts to match your face.
• 8.After initiating power off or Emergency SOS.

Part 2. How to Set up Face ID on iPhone

As mentioned previously, you have to set up Face ID on your iPhone or iPad to use it to unlock your device or access other services. The workflow is not very difficult, and we demonstrate it below:

Part 3. How to Add Another Face ID

Can you have multiple Face IDs? Currently, you can add two Face IDs on a single device. We suggest that you add a basic Face ID first. Then, you can add another Face ID with sunglasses or a mask, depending on your needs.

Part 4. How to Use Face ID for App Store and More

Once set up Face ID, you can use Face ID for App Store, iPhone unlock, payments, and other services. More importantly, you can turn each option on and off according to your situation and needs.

How to Use Face ID for App Store

How to Use Face ID for Apps

How to Put Face ID on Messages

Part 5. How to Reset Face ID

Once you add a Face ID, you cannot remove it. In other words, you can only add two Face IDs on your iPhone or iPad and cannot delete one separately. Alternatively, you have to reset Face ID and completely remove all Face IDs from your device. Furthermore, resetting Face ID is an indispensable step to fix Face ID not working.

Part 6. What to Do If Face ID Is Not Working

As mentioned previously, if Face ID is not working, you can reset it and set up Face ID again. However, you may be locked out of your device if you forgot your passcode. The ultimate solution is imyPass iPassGo. It is able to remove any iPhone screen locks, including Face IDs without any restrictions. Furthermore, the user-friendly interface makes it easy to use for beginners.

How to Remove Not Working Face ID from Your iPhone

Download and install the Face ID removal software on your PC from the official website. It is compatible with Windows 11/10/8/7. There is another version for Mac users. Launch the software and choose the Limpar senha modo para prosseguir.

Connect your iPhone to your PC with a Lightning cable. If you link the two devices for the first time, tap Confiar na tela para confiar neste PC.

Once the software detects your device, click on the Começar button to scan your iPhone. Then, you will be presented with your iPhone information. Check your device category, type, and model. If any option is wrong, correct it. Click on the Começar button to begin downloading the firmware package. It may take a while, depending on your internet connection.

Once the firmware download is complete, click the Desbloquear button to continue. Read the notification and confirm Face ID removal again. Next, type in 0000 to ensure the process. Then, the software will initiate iPhone unlocking immediately. When it is done, your iPhone will restart.

Conclusão

Este guia explicou how to set up Face ID on iPhone and iPad, as well as other information you should know. We shared how this system works, how to use it for iPhone lock and other services, and more. You can follow our guide to set up and use the facial recognition system on your iOS device. If your Face ID suddenly doesn't work, imyPass iPassGo can help you resolve this problem quickly.