 International Business Times AU | Which smartphone system is right for you? CNN International Apple, Google and Microsoft each has its own mobile operating systems and ecosystems -- iOS, Android and Windows Phone, respectively -- and they've all been updated in the last year. The three rivals will be going head to head on shiny new handsets ... Windows Phone sales to "ramp quickly": Microsoft CEO Microsoft Begins Restoring 'Invisible' Windows Phone Apps Nokia Lumia 920 review: Windows Phone's white knight falls short again |