up the iPhone to unlock it, the Face ID sensors run a quick scan and unlock the iPhone so that s do not have to press any buttons or enter any s.
Before Face ID came into existence, Apple used the iconic Touch ID that scanned s' fingerprints to unlock their smartphones. Touch ID retained its position on iPhones from iPhone 5s to iPhone 8 Plus, doubling as the home button. However, the sensor used in Touch ID was slow, and it occupied a lot of space in the iPhone chassis, resulting in a large bottom bezel. Apple bid farewell to its outdated fingerprint scanner with the launch of Face ID. However, Touch ID is still used on iPhone SE 3 and iPad (9th Gen).
To recall, except the iPhone SE 2020 and iPhone SE 3. This includes the iPhone X, iPhone 11, iPhone 12 and the latest iPhone 13.
Face ID Is More Secure Than Apple's Touch ID
While releasing Face ID, Apple explained that a chance of a random person unlocking an iPhone through Face ID is one in a million. In comparison, Touch ID could be fooled about one in every 50,000 attempts. This shows that Face ID is 20 times more secure than the fingerprint sensors used on older iPhones. Furthermore, on the official page, Apple says that "the technology that enables Face ID is some of the most advanced hardware and software that we've ever created." This entails projecting and analyzing thousands of data points to create a three-dimensional map of s' faces along with an infrared image and then converting it into a mathematical representation for comparison.
Face ID was designed to work with hats, scarves, glasses, and sunglasses. However, it can also adapt to subtle changes in the 's appearance, like a growing beard. Additionally, Face ID works with masks with iOS 15.4 on iPhone 12 and later.
Source: Apple