It was an ambitious concept that would require huge engineering leaps, but Cook endorsed a plan that would minimize the risks. The PrimeSense technology would become part of a premium iPhone that would sell at a higher price. The cost increase would offset the pricier components, but perhaps more important, it would moderate the demand for a product that many feared would be hard to make in the numbers a popular new iPhone would sell, upward of 50 million units in about three months. They would fulfill the excess demand—and hedge against a possible facial recognition failure—by complementing
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