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So my brother got the iPhone 12 recently and me and him have very different facial features and structures, I was going to put the password in to unlock it but then I noticed that my face unlocked the phone, now his face doesn’t unlock my iPhone XR
can someone explain why this is?
iPhone XR, iOS 14
Familial similarities can cause Face ID to unlock a device:
The probability that a random person in the population could look at your iPhone or iPad Pro and unlock it using Face ID is approximately 1 in 1,000,000 with a single enrolled appearance. As an additional protection, Face ID allows only five unsuccessful match attempts before a passcode is required. 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.
About Face ID advanced technology - Apple Support
Familial similarities can cause Face ID to unlock a device:
The probability that a random person in the population could look at your iPhone or iPad Pro and unlock it using Face ID is approximately 1 in 1,000,000 with a single enrolled appearance. As an additional protection, Face ID allows only five unsuccessful match attempts before a passcode is required. 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.
About Face ID advanced technology - Apple Support
My face unlocks my brothers iPhone 12
