Moments after Phil Schiller got done extolling the accuracy of the iPhone X’s brand-new, ultra-sophisticated Face ID authentication system, Apple’s software chief Craig Federighi came onstage to show how easy and fast it is to actually use. Unfortunately, Federighi’s initial attempt to unlock the onstage demo iPhone X was unsuccessful. The passcode screen popped up. He then picked up a second iPhone X and the feature worked successfully.