https://www.theguardian.com/technology/2017/sep/14/apple-face-id-didnt-fail-at-iphone-x-launch-staff >Company says too many people tried to use Face ID on device backstage before its unveiling, highlighting a potential problem for prospective buyers >Apple has offered an explanation for an embarrassing glitch at the launch of its most expensive iPhone ever, arguing that the phone didn’t make an error – the company’s staff did.