Although many thought it was a waste of time, Apple CEO Steve Jobs insisted on prototyping all concepts before the Mac OS-X-based version of the operating system was selected. Many user interfaces were prototyped, including the multi-touch click-wheel. The idea of introducing a complete touch screen was very novel to everyone. Many on the team were still hung up on the idea that everyone would want to type on a hardware keyboard, not a glass screen. During the development phase of iPhone OS 1, there were at least 17-18 different concepts developed. No official name was given when the iPhone was released Apple marketing literature simply stated the iPhone ran a mobile version of " OS X". Apple announced iPhone OS 1 at the iPhone keynote on January 9, 2007, and it was released to the public alongside the original iPhone on June 29, 2007.
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