There are two things about that iPhone X that will never stop to be controversial: its notch and its removal of any fingerprint scanner in favor of Face ID. The former was by necessity but the latter, no matter how much Apple denies it, was due to the unavailability of in-display fingerprint scanners at that time. What if Apple had waited a year longer? What would the iPhone X have been like? Now you longer have to wonder because the Vivo X21 UD has just answered it for you.