Face ID sets up your face in 2 rounds.
Round one. have the camera in front of you and have FACE ID do your profile
Round two. make sure your face is at a very low angle and have Face ID do your profile again
Now you will be able to unlock your phone at very steep angles very fast. also increases Face ID unlock when in front. The trick here is you never had the phone above your head but you have it either in front or under your face and having both profiles of your face increases accuracy
Round one. have the camera in front of you and have FACE ID do your profile
Round two. make sure your face is at a very low angle and have Face ID do your profile again
Now you will be able to unlock your phone at very steep angles very fast. also increases Face ID unlock when in front. The trick here is you never had the phone above your head but you have it either in front or under your face and having both profiles of your face increases accuracy