[thallium205]

My wife and her sister can unlock each other’s iPhones using the face unlock feature which blows my mind because they do NOT look super similar and are 4 years apart. I’ve turned off all biometrics and use only a PIN. I’m extremely skeptical of the tech.

[busymom0]

My sister in law's mom and her daughter have the same thing too where the daughter can unlock her mom's phone with faceID. I researched this and apparently, if you have an unsuccessful unlock first and then you enter the code to unlock, then the phone may train the faceID with the new face too.

[diggan]

> if you have an unsuccessful unlock first and then you enter the code to unlock, then the phone may train the faceID with the new face too

Ay wat? That sounds completely backwards, like if an incorrect password for account login would automatically reset the account password to the incorrect one, how would that make sense?!

[LexGray]

Worked that way from FaceID introduction. Apple never cared enough. If you share your phone it is on you that the phone accepts the face who you share it with after you enter a pin. It really should have a new face button under the pin.

[wiether]

That's weird!

I got braces recently and I had to go through the FaceID process again because it didn't recognized me anymore.

Obviously my teeth are quite different with my mouth open, but apparently, it modified my face enough when mouth closed that FaceID thaught I was not myself anymore.

[al_borland]

Wow, that’s pretty interesting. I wouldn’t think that would be enough to impact it without some accompanying procedures, like expanding the pallet, or some kind of jaw surgery.

Was it right away from getting the braces put on (from a little extra bulk on the teeth), or after they’ve been on for several months, where the movement of the teeth could change the structure of the face around the mouth?

[wiether]

It started as soon as I left the orthodontist's place.

Based on what I can see in the mirror and the fact that some people asked me if I had lost weight (I didn't), it appears that the braces on the upper teeth are pushing my upper lip away, which in turns is pulling my face skin, resulting in more hollow cheeks and more visible cheekbones.

[int_19h]

I wonder if it depends on the phone model as well, and specifically on the quality of whatever sensor they use for depth perception.

[poulpy123]

I'm just using a PIN too, I don't want to give google/apple/any other my fingerprints or my face features

[Gigachad]

Two situations I can think of, they might have Bluetooth unlock with an apple watch enabled, or they might have the work with masks setting turned on which turns the accuracy to shit.

[svachalek]

Your watch should not unlock someone else's phone though.

[Gigachad]

The point is if you have watch unlock enabled and someone unlocks your phone standing right next to you, it's still in range to unlock your phone with your watch.

[al_borland]

Doesn’t the screen indicate which unlock method it’s using?