Face ID is designed to work when you hold your iPhone about 10-20 inches away from your face. If Face ID is not working on your iPhone, you may be holding it too close or too far away from your face.
How Do I Make Sure You're Holding My iPhone The Right Distance From My Face?
- Hold your arms straight out in front of you to make sure it's far enough away from your face.
- You may need to close and reopen the Settings app if Face ID failed the first couple of times.