The iOS 12 beta appears to support adding a second face to the Face ID feature, allowing a second person to unlock an iPhone X without entering the passcode. This was discovered and later confirmed by multiple users on Reddit.
Ever since the iPhone X was released last September, Apple's Face ID authentication system has been restricted to recognizing a single person's face to unlock the iPhone X. Though iOS is ostensibly designed as a single-user operating system, this restriction has frustrated some users who wish to allow their partner or other family member to unlock their phone for convenience and sharing purposes.
This is possible under the old Touch ID system, which has been around for nearly half-a-decade, because Touch ID allows up to five fingerprints to unlock the iPhone — so it's easy to allow your partner's thumbprint to your iPhone.
With iOS 12, an "Alternative Appearance" mode in Face ID allows iPhone X owners to add an entire second face to Face ID. This means two people can unlock an iPhone X, potentially making it easier for users to share their devices.
The feature doesn't appear to be intended for this purpose. In iOS Settings > Face ID & Passcode, Alternative Appearance is described thusly:
One thing to note is that if Face ID is reset for one "Appearance", it will also reset the other, meaning both users will have to start from scratch with Face ID if the system is reset.
We have reached out to Apple for clarity on what this feature is intended for and whether the side-effect of support for multiple users is expected to continue through the final release of iOS 12 this fall.
Ever since the iPhone X was released last September, Apple's Face ID authentication system has been restricted to recognizing a single person's face to unlock the iPhone X. Though iOS is ostensibly designed as a single-user operating system, this restriction has frustrated some users who wish to allow their partner or other family member to unlock their phone for convenience and sharing purposes.
This is possible under the old Touch ID system, which has been around for nearly half-a-decade, because Touch ID allows up to five fingerprints to unlock the iPhone — so it's easy to allow your partner's thumbprint to your iPhone.
With iOS 12, an "Alternative Appearance" mode in Face ID allows iPhone X owners to add an entire second face to Face ID. This means two people can unlock an iPhone X, potentially making it easier for users to share their devices.
The feature doesn't appear to be intended for this purpose. In iOS Settings > Face ID & Passcode, Alternative Appearance is described thusly:
In addition to continuously learning how you look, Face ID can recognize an alternate appearance.It's likely that Alternative Appearance is designed for people who have difficulty with Face ID because of more significant changes in appearance due to changing wardrobes like glasses or hats — but it has the happy coincidence of supporting a second person as well.
One thing to note is that if Face ID is reset for one "Appearance", it will also reset the other, meaning both users will have to start from scratch with Face ID if the system is reset.
We have reached out to Apple for clarity on what this feature is intended for and whether the side-effect of support for multiple users is expected to continue through the final release of iOS 12 this fall.
Related Roundup: iOS 12
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