Apple reportedly has reduced the accuracy of the iPhone X Face ID feature to speed up production. It's not clear how much the new specs will reduce Face ID's efficacy, but if the reporting is accurate, there could be problems recognizing changes in facial hair, glasses and other ancillary features, suggested Gerrit Schneemann, senior analyst at IHS Markit. "That would be a real problem." The iPhone X doesn't have a fingerprint scanner, and facial recognition is the only biometric unlock mechanism for a number of iPhone features, he pointed out.