Windows Phone 7/ Windows Mobile narrowed the gap between itself and BlackBerry last quarter in its bid to become the number 3 mobile OS in terms of market share. The share gains it made last quarter are due mostly to Nokia, which almost doubled its Lumia/Windows Phone shipments sequentially. Though it’s closing in on the third spot, Windows Phone is still a distant competitor to Android and iOS. Microsoft will need to generate additional momentum from Windows Phone 8 devices, which will be introduced this fall, if it is to narrow the share gap further between itself and the three mobile OS leaders.