During Apples quarterly earnings call today, Apple CEO Tim Cook admitted that the company made some miscalculations about consumer demand for the iPhone 5S and iPhone 5C in North America. Apple doesnt break out individual sales figures for each iPhone model, but Cook made it clear that the iPhone 5S has thus far proven more popular than the cheaper 5C. The mix was stronger to the 5S, and it took us some amount of time to build the mix that customers were demanding.” I think the 5S, people are really intrigued with Touch ID, he said.