Affiliate Disclosure
If you buy through our links, we may get a commission. Read our ethics policy.

Gripping buttons on both sides of iPhone X disables Face ID, recognition works with most sunglasses

Apple software chief Craig Federighi has revealed that Face ID unlock on the new iPhone X will come with a hidden security feature, allowing users to press buttons on both sides of the phone to temporarily disable the facial recognition capabilities.

Keith Krimbel emailed Federighi this week, and received a response which he share on Twitter. Krimbel asked what measures Apple was taking to ensure a thief cannot take a user's iPhone X, point it at their face and then run away with the device unlocked.

"There are two mitigations: if you don't stare at the phone, it won't unlock," Federighi said. "Also, if you grip the buttons on both sides of the phone when you hand it over, it will temporarily disable Face ID."

Krimbel also asked if Face ID will work with sunglasses, and Federighi explained that "most" but not all will not interfere with the biometric unlock mechanism.

"Most sunglasses let through enough IR light that Face ID can see your eyes even when the glasses appear to be opaque," he explained. "It's really amazing!"

The response from the Apple executive also included mention of the onstage error where Face ID did not work as expected. Apple has already explained that the feature actually worked as expected: The iPhone X prompted Federighi for a password because it had accidentally being prompted to unlock other, unauthorized faces before the device was put onstage.

"For those of us who have been living on the... iPhone X over the last months this has never been a real problem (hence my shock when it happened to me on stage! :-)," Federighi wrote.

Other tidbits about Face ID on the iPhone X continue to trickle out, including the fact that the technology will be limited to one face per device at launch. It was also revealed that Apple has been planning for Face ID to replace Touch ID entirely for over a year now, dispelling rumors that the company was trying to embed Touch ID into the iPhone X display as recently as this summer.

Apple's Face ID technology introduced in the iPhone X is made up of four components including an infrared camera, a flood illuminator, a dot projector, and the front camera. The combination of sensors generates a 3D map of the face that it compares to the mathematical models of the stored face, utilizing the new A11 Bionic neural engine.



37 Comments

mac_128 12 Years · 3452 comments

Seems like a reckless move ... if the thief knows enough about what he's stealing to point it at your face, I think doing anything to thwart their ability to unlock your phone is bad advice.

But a pick pocket actually could point your phone at your face and run away with it unlocked ... if a person didn't know their phone had been lifted, and turned to look at someone yelling "hey you", only to find themselves looking at their iPhone held to their face, the thief could run off before the person even knew what was happening or that they had just unlocked their own iPhone for a thief they barely had time to notice.

But most of these are the usual silly questions. If someone holds you up and wants your phone unlocked, then they're going to get that to happen regardless of these features. Best just to hand it over unlocked. For the typical thief, this isn't going to be an issue. 

78Bandit 7 Years · 238 comments

So now I can disable face recognition every time I want to adjust the volume, put the phone to sleep, shift the phone from one ear to the other, or even just grab it from my pocket.  I hit the power and volume buttons together all the time.  They need to move the power button back to the top or at least make it where they aren't directly opposite each other.

StrangeDays 8 Years · 12986 comments

mac_128 said:

But a pick pocket actually could point your phone at your face and run away with it unlocked ... if a person didn't know their phone had been lifted, and turned to look at someone yelling "hey you", only to find themselves looking at their iPhone held to their face, the thief could run off before the person even knew what was happening or that they had just unlocked their own iPhone for a thief they barely had time to notice.

That is such an absurd edge case it's not even worth mentioning. It will likely never, ever happen, not even once. Have you ever been pick-pocketed? Do you know anyone who has had their iPhone pick-pocketed? Did the pretend pick pocket then take time to analyze the device to see what brand it is, then which model it was, and then -- rather than make haste -- interact with the pretend victim? No, no, no, and no. 

This kind of fiction is best left to bad television.

StrangeDays 8 Years · 12986 comments

78Bandit said:
So now I can disable face recognition every time I want to adjust the volume, put the phone to sleep, shift the phone from one ear to the other, or even just grab it from my pocket.  I hit the power and volume buttons together all the time.  They need to move the power button back to the top or at least make it where they aren't directly opposite each other.

Oh for christ's sake. 

Get ready to produce a lot of screenshots.

fallenjt 13 Years · 4056 comments

mac_128 said:
Seems like a reckless move ... if the thief knows enough about what he's stealing to point it at your face, I think doing anything to thwart their ability to unlock your phone is bad advice.

But a pick pocket actually could point your phone at your face and run away with it unlocked ... if a person didn't know their phone had been lifted, and turned to look at someone yelling "hey you", only to find themselves looking at their iPhone held to their face, the thief could run off before the person even knew what was happening or that they had just unlocked their own iPhone for a thief they barely had time to notice.

But most of these are the usual silly questions. If someone holds you up and wants your phone unlocked, then they're going to get that to happen regardless of these features. Best just to hand it over unlocked. For the typical thief, this isn't going to be an issue. 

You made a stupid case that would never happen in the real life. Would you steal someone's iPhone and yell at that person to look at the phone to hopefully unlock it?