GSMArena reports that a recent Kantar survey shows that Android and iOS are still the top mobile OS platforms. Windows Phone is gaining momentum at the expense of Blackberry and Symbian. That's good news for Nokia! Personally, I love Windows Phone but the one major downside is the lack of quality apps. With the growth of WP, I am hoping that more and more developers are going to be more interested in releasing apps or at least get more of the existing popular apps to this promising OS.