My daughter is able to unlock my iPhone 11 pro Face ID with her face while the registered Face ID is mine

How my daughter is able to unlock my iphone 11 pro face id with his face while the registered face id is mine......

please contact me

If your daughter knows passcode for your iPhone, the device might have learned how to recognise her too. Face ID automatically adapts to changes in your appearance. It constantly learns how to recognise you. If there is a more significant change in your appearance, by providing correct passcode you are telling Face ID to update your face data. So if this is your daughter who is unlocking the device by providing correct passcode, her face is very likely added to face data too.

Change your iPhone’s passcode, reset and setup Face ID again. Passcode is your primary method to secure your device. Don’t share it with anybody and if you are allowing others use your iPhone, unlock it first yourself.

Hi there jaishreepadma,

I’m happy to see that you posted to the Apple Support Communities for assistance and I understand you're concerned that your daughter is able to unlock your iPhone 11 Pro with Face ID. I'm happy to recommend some troubleshooting and provide info about that.

Is this iPhone running iOS 13.3? If it isn’t or you aren’t sure, updating your iPhone would be a good idea: Update your iPhone, iPad, or iPod touch

Is your daughter under the age of 13? If so, this info could be relevant:

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

Use a passcode with your iPhone, iPad, or iPod touch

Best regards.