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iMas70

macrumors 65816
Original poster
Sep 4, 2012
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MA
My 12 year old twins just found that they can unlock each other's phones using Face ID. They're kind of identical but I didn't think they are that identical to be able to do that.
 
My 12 year old twins just found that they can unlock each other's phones using Face ID. They're kind of identical but I didn't think they are that identical to be able to do that.

And this surprises you how?

Thus, term “IDENTICAL”...and FaceID not recommended below 13 years of age.

Please read: https://support.apple.com/en-us/HT208108

“The statistical probability is different for twins and siblings that look like you and among children under the age of 13, because their distinct facial features may not have fully developed. If you're concerned about this, we recommend using a passcode to authenticate.”
 
And this surprises you how?

Thus, term “IDENTICAL”...and FaceID not recommended below 13 years of age.

Please read: https://support.apple.com/en-us/HT208108

“The statistical probability is different for twins and siblings that look like you and among children under the age of 13, because their distinct facial features may not have fully developed. If you're concerned about this, we recommend using a passcode to authenticate.”
I mean seriously. This has already been reported on and a little bit of research would have shown this.
 
Your only option is to alter the appearance of one twin enough so they cannot pass for each other. I'd recommend refraining from followup posts; depending on what you do, you wouldn't want child protective services to be able to trace it back here. ;)
 
I can tell them apart so they aren't total mirror image. We were at the Apple Store this evening. The person we were talking to was surprised when they were able to unlock each other's phones.
 
I've got twins, but they're much younger than yours. I reckon Face ID relies on a specific percentage of similarity in key areas that wouldn't otherwise be the same in the majority of cases. In other words, if Face ID relies on a 90-95% field match, then it'll unlock. You have to give some leeway to the software for it to recognize you over time.
 
Hopefully they don’t steal each other’s credit, buy an island, and open a credit card to buy a helicopter. That would be a major Face ID fail
 
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My 12 year old twins just found that they can unlock each other's phones using Face ID. They're kind of identical but I didn't think they are that identical to be able to do that.

This shouldn’t really surprise anyone. I think Apple themselves acknowledged that FaceID is unlikely to be twin-proof, but of course only a small percentage of the population has to worry about that. Using a plain old passcode is still always an option.
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Ummm...what?

I think what he means is that if it fails to recognize your face and then you verify your identity with a passcode, the system is designed to learn from its mistakes, so to speak, so it becomes less likely to fail to recognize you in the future.

However, I don’t see how this would help in this case. If anything, it might just get better at recognizing and accepting both faces, and make the problem worse. I don’t think there’s a way to tell the system that it shouldn’t have accepted a face.
 
#twinproblems. On the plus side, any 12-year-old ought to be giddy to have an iPhone X, XS, or XR.

If they really want to keep each other from a snooping, I suppose they could disable FaceID or get the iPhone 8. I have cousins who are twins in their 30’s. From what they have told me it is possible for one twin to create all kinds of mischief for the other with or without technology. They quickly learned to stay on each other’s good side. :p

Fortunately they never made much trouble for each other. They are so close they probably don’t care if one can unlock the other’s iPhone.
 
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what does kinda identical mean? either they're identical...or they're not.
 
what does kinda identical mean? either they're identical...or they're not.

Maybe they are fraternal twins who look identical except for subtle differences? Or maybe they are identical twins who look slightly different because of weight, hairstyle, etc? I was curious about this as well. Hairstyle isn’t going to make a difference. Slightly different face shape because of weight differences probably wouldn’t either. Their faces will still match in a lot of ways.
 
Maybe they are fraternal twins who look identical except for subtle differences? Or maybe they are identical twins who look slightly different because of weight, hairstyle, etc? I was curious about this as well. Hairstyle isn’t going to make a difference. Slightly different face shape because of weight differences probably wouldn’t either. Their faces will still match in a lot of ways.
One of em gets broken nose, solves problem. Be sure to reset it abit crooked. :confused:
 
unlocking each others phones with the right password can also create a match on 2 different people if they have enough similarities. Face id is constantly learning what you look like which can cause this effect

So twins are not especially surprising. You know your kids so can spot the subtle differences. A computer is nowhere near as good. At least not yet...

The answer is simple, don't use face ID
 
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My 12 year old twins just found that they can unlock each other's phones using Face ID. They're kind of identical but I didn't think they are that identical to be able to do that.
FaceID is nice but it does have its limitations. especially when it comes to family members.....

This 10 year old can unlock his Mom's phone with FaceID

 
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