The phone thing isn't unique to Huawei. My wife has two sisters and they can unlock each others phones using Face ID. They were surprised when they realised thi

The phone thing isn't unique to Huawei. My wife has two sisters and they can unlock each others phones using Face ID. They were surprised when they realised this so I don't think they added each other's face or anything (I don't know if you can do that though..).