The toughest challenge Apple had with the new smartphone was replace Touch ID, notes Riccio. "It was very, very hard. If we were going to replace it we wanted to replace it with something that was at the end of the day both better and more natural."
Riccio's statement contradicts numerous rumors leading up to the unveiling of the iPhone X.
“I heard some rumor [that] we couldn’t get Touch ID to work through the glass so we had to remove that,” Riccio says, answering a question about whether there were late design changes. “When we hit early line of sight on getting Face ID to be [as] good as it was, we knew that if we could be successful we could enable the product that we wanted to go off and do and if that’s true it could be something that we could burn the bridges and be all in with. This is assuming it was a better solution. And that’s what we did. So we spent no time looking at fingerprints on the back or through the glass or on the side because if we did those things, which would be a last-minute change, they would be a distraction relative to enabling the more important thing that we were trying to achieve, which was Face ID done in a high-quality way.”