Every year band new Mobile OS always says hello to their users, Android 4.x, Mango 7.5 and iOS 6 just freshly unveiled by Apple.
I guess it's hard to choose which mobile OS for some new users, so here is a comparison chart made by redmondpie: iOS will now have Facebook integration baked into the OS itself, Google has its own music store now (in the form of Google Play), all three platforms have seen substantial growth in their respective app ecosystems, and Windows Phone (sort of) has its own voice assistant functionality now in the form of Tellme. While we’re on the note of Windows Phone, something that I didn’t mention was that the Zune brand is being phased out, and its functionality as far as music and movie sales will be replaced with Xbox Music, and, well, perhaps something else for movies.
So, which platform is the winner here? Obviously, neither; people have different preferences and use cases in which they may find better utility or preference in one platform over the other. Really, it’s up to you; personally, I prefer and use iOS on a daily basis. Second to that, I like the Windows Phone user-interface. And finally, Android. Though highly customizable, I’ve never been a fan of its user interface of the many devices themselves that host the operating system.