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The iPhone has a user interface built around a multi-touch screen. As of November 1, 2018, more than 2.2 billion iPhones had been sold. Since then, Apple has annually released new iPhone models and iOS updates. The first-generation iPhone was announced by then-Apple CEO Steve Jobs on January 9, 2007. that use Apple's iOS mobile operating system. The iPhone is a line of smartphones designed and marketed by Apple Inc.