How To Set Up Face ID And How Does Face ID Work?


In this blog post, I will thoroughly explain what is Face ID, and I will tell you everything you need to know about it.


How To Set Up Face ID

What Is Face ID?


What Is Face ID?

Face ID is Apple’s facial recognition system that was launched on the iPhone X in 2017.


Face ID replaced Apple’s Touch ID fingerprint scanning system on every iPhone that’s been released since the release of the iPhone X.


It’s likely that this trend will continue with iPhones in the future. Face ID uses Apple’s TrueDepth camera system which consists of cameras, sensors, and a dot projector at the top of the display screen which is housed in the notch.


Everything works together to create a detailed 3D map of your face. When you use FaceID to unlock the iPhone, a secure authentication check will be completed. The iPhone will instantaneously unlock upon identifying you as the owner.


What Can You Do With Face ID?


What Can You Do With Face ID?


  • Use it to unlock your iPhone.
  • Use it to authenticate payments from Apple Pay.
  • Use it to send animated emoji’s in messages.


How Does Face ID Work?


How Does Face ID Work?


TrueDepth Camera System:


Every time you look at the iPhone to unlock it, the TrueDepth camera system will use a flood illuminator to detect your face.


This feature also works well in the dark, the infrared camera takes an image, and the dot projector will project over 30,000 infrared dots which are completely invisible.


At this point, the system will collect the infrared image of your face and the infrared dots and send them to the neural networks to create a 3D mathematical model of your face.


Neural Networks:


In the neural engine, the iPhone will compare mathematical models of your face with the one that’s stored in the database to see if they match.


If a match has been made, the iPhone will unlock or authorize a payment via Apple Pay if you’re trying to pay for something. This process is extremely fast and responsive when it happens in real-time.


Apple stated that it worked with many people across the globe and took well over one billion images, those images were used at a later time to develop multiple neural networks which formed its Face ID technology.


Bionic Neural Engine:


To process all the data necessary for Face ID through machine learning, Apple developed the A11 Bionic neural engine.


This is a processor that was upgraded to the A12 Bionic neural engine in 2018 with the release of the iPhone XR, XS, and XS Max.


The upgraded processor improved the Face ID technology. Shortly thereafter, the A13 was introduced in 2019 with the release of the iPhone 11, 11 Pro, and 11 Pro Max which further improved the Face ID technology.


These processors are specialized hardware that was built to work in conjunction with machine learning algorithms.


They are extremely fast and powerful, they can handle hundreds of billions of operations per second which makes it possible for this technology to be used in a real-time facial recognition system.


This information isn’t important to the user because this feature is extremely easy to use and it has a very high success rate.


The Face ID feature is 30 percent faster now than it was when it debuted on the iPhone X. Not only is it faster, but more angles are supported, thus giving you the ability to unlock the iPhone when it’s close to you without having to pick it up.


How To Set Up Face ID:


  1. Tap Settings
  2. Tap Face ID & Passcode
  3. Enter your Apple passcode
  4. Tap Enroll Face (under Face ID)
  5. Tap Get Started and follow the prompts on-screen
  6. Then you must position your face into the frame when asked to do so


For best results, when setting up Face ID, you must move your head around slowly to allow Face ID to fully scan your face. The iPhone will take two scans of your face to complete the process.


This process enables Face ID to learn about the physical features of your face. So if you shave/grow a beard, or change our hairstyle, Face ID will still recognize you. This feature works well during the day and at night.


Can I Use Face ID For Payments?


Can I Use Face ID For Payments?


Yes, Face ID can be used for payments via Apple Pay. To do this you should follow the steps below.


  1. Double-tap the Power/Wake button on the side of the iPhone
  2. Look into the iPhone to unlock it via the Face ID feature
  3. Then hold it near the contactless payment terminal


Can I Use Face ID With Apps?


Yes, Face ID can be used with a variety of third-party apps, including Mint and a number of banking apps, E-trade, and One Password.


Is Face ID Secure?


Yes, it is, when Apple launched Face ID it said that Face ID cannot be tricked. Apple has worked with professional make-up artists and mask-makers in Hollywood to train the neural networks to protect Face ID from being spoofed.


The data that gets collected when you scan your face for the very first time with Face ID is protected by a secure enclave in the Bionic processors.


All the processing is done within the processor, so your face data will never be sent to a remote server.


Your attention is needed to unlock the iPhone via Face ID, so if you’re looking away or if you have your eyes closed, Face ID will not unlock the phone.


Apple claims that the chances of someone else being able to unlock your iPhone via the Face ID feature is one in one million.


This is a significant improvement over Touch ID, which Apple stated has a false-positive rating of one in 50,000.


However, you should be aware that if you have an identical twin, these statistics are lower so you will have to set up a passcode to provide an additional layer of security.


What Happens If Someone Steals My iPhone?


Craig Federighi who is an Apple software engineering chief, replied to an email from a developer named Keith Krimbel who asked what would stop a person from stealing someone’s iPhone then pointing it at their face and running away with the unlocked iPhone.


Federighi stated “If you don’t stare at the phone, it won’t unlock,” and “Also, if you grip the buttons on both sides of the phone when [you] hand it over, it will temporarily disable Face ID,”.


Some Additional Face ID Info That You Should Know:


When the iPhone X was released, Apple developed a new type of emoji called Animoji in 2017. Since then Apple has also developed Memoji as well.


These are animated emojis that you have the ability to control with your facial expressions, they will match your facial expressions in real time.


Now you know everything there is to know about Face ID. If you have any questions or comments about any of this information, please feel free to share them in the comment section below.



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