Why? Face ID on iPhone will not work, even if you bring it closer to a sleeping person, because the user must look at the smartphone during authentication:
Step 1: Remove the device from sleep mode.
Step 2: "In the frame" of the sensor must necessarily be the eyes, nose and ears.
Step 3: Open your eyes;
Step 4: We look at the iPhone.
It is not necessary to have the gadget strictly at eye level, but still it is advisable not to be removed from the field of face coverage by sensors.
The company did not report the boundaries of the sensor review, but it’s already clear that you should just hold the smartphone in front of the person for authentication.
Users who fear that during their sleep an unscrupulous friend or partner will try to unlock the device, we inform you that this is impossible.
In addition, Apple notes that even a high-quality photo or a mask with the image of the owner of the device will not help to unlock it.
There is only one exception: if you sleep with your eyes open. In this case, if you have any concerns, you can simply disable the authentication via Face ID, but after that you will have to remove the lock by entering a password.
At the same time, those who wish to secretly explore the contents of someone else's smartphone will recommend not to do this, since it is a waste of time - you will not be able to unlock your iPhone without its owner.
Question: Can I unlock an iPhone X, XS or XR with my husband (wife) face while he / she is sleeping?
Answer: No.