Has any one had iPhone X unlock with identical twins or just twins face?

The reason that I asked my question is that Face ID "learns" as we use it. If it encounters difficulty, and requires you to use the passcode, it will remember differences, such as glasses, hats, etc. With twins, if you set it up and your identical twin is very close to your appearance, if it didn't unlock with Face ID, and she used the passcode while looking at the device, Face ID can "learn" the subtle differences and then allow that change. It wouldn't work with major differences, but this can explain very subtle changes.

Which senior executive were you talking to?

This is from an article The Verge published when the iPhone X was released:

"Then there’s the impostor problem. Phil Schiller joked about evil twins (specifically Evil Spock) at the keynote, but Apple clearly takes the problem seriously, recommending against Face ID use if you’re worried about someone with your facial features accessing your phone."

https://www.theverge.com/2017/9/27/16373710/face-id-iphone-x-apple-facial-recogn ition-impostor

You can read the article yourself and it will mention the 1 in 1 million for the general populating but note that twins entirely change this number. You can also watch Mr. Schiller, a senior Vice President giving the keynote.

A question: Did you hand her the iPhone while she was facing you and she opened it and then read something in your iPhone? Because if she is standing beside you it is reading you. If she hands it to you it opens when you look at it.

When Apple announced the iPhone X they made it clear that it would open with the face of an identical twin (they did not say it was 1 to 1 million) and hoped that no one had an evil twin.

Let me see if I got this correctly, you purchased the phone, you set up Face ID for yourself. Then your identical twin picked up the locked phone, swiped up and the phone unlocked from Face ID without any additional interaction from you or your twin? Was this the first time that your twin ever handled the phone, or had your twin tried to unlock with Face ID and then use the passcode once, then tried Face ID again?

read the section right after the red boxed section.

We've had reports of siblings (not twins) unlocking a face ID.

Even those of a different sex.

Not a big deal.