The iPhone, the device that redefined the mobile phone and has helped make Apple the most valuable company in the world, marks its 10th anniversary on Monday. It was on January 9, 2007, that late Apple founder and chief executive Steve Jobs went on stage at the company’s Macworld event to announce the tech giant was to reveal “an iPod, a phone and an internet communicator” – but rather than three separate products being revealed, one of the first truly smart phones was unveiled.