We guess it goes without saying that Windows Phone is hardly the largest smartphone platform at the moment. In fact based on past figures, Windows Phone’s market share is pretty small compared to the likes of Android and iOS, but apparently it is also the fastest growing OS in the world, according to a recent report on Mobile Trends released by Kantar. To put it into perspective, Kantar has found that Android currently has about 70% of the smartphone market in 12 major world economies, while iOS accounts for 22%.