Did my wife's phone learn my face for FaceID all by itself?

[Canyda]

So here's a weird one - my wife often hands me her XR to "do things" for her, i.e., if I'm trying to AirDrop photos she'll just give me her phone and let me use her passcode to open it up and I'll drop over the pictures; or deal with a suspicious email, or whatever. The point is I'm in front of her phone entering her passcode at least a few times a month.

This weekend, she handed me her locked phone to do another photo dump via AirDrop, and it just ... opened for me using my face.

I know that FaceID learns your own face (mine will open my phone if I'm wearing a hat and sunglasses) but does it also learn OTHER PEOPLE'S faces if it believes they're a "trusted user"? (On the grounds that I have repeatedly entered her passcode into the locked phone, so it's now associating my face with a successful phone opening?)

This isn't a complaint, either. I'm just puzzled as if this is expected behaviour from iOS FaceID that I've never encountered before.

 

[killawat]

Yes it can learn other peoples faces. If you successfully unlock your device after failing FaceID then you eventually become another accessory that faceID recognizes like sunglasses or a mask.

 

[Canyda]

Yes it can learn other peoples faces. If you successfully unlock your device after failing FaceID then you eventually become another accessory that faceID recognizes like sunglasses or a mask.

Interesting. Appreciate the clarification on that.

 

[MarcNBarrett]

I have been using my wife's iPhone 11 occasionally for a couple of years, and it has never registered my face with faceID. I have to unlock it with a PIN.'