Apple on Tuesday unveiled two new versions of the iPhone, boosting the screen size of the iconic smartphone to 4.7 and 5.5 inches. Unveiling the iPhone 6 and iPhone 6 Plus, Apple chief Tim Cook said the company was launching the biggest advancement in the history of iPhones. Apple senior vice president Phil Schiller, speaking at the event in Cupertino, California, said the new iPhones were simply stunning with improved displays thanks to polarized glass.