is still one of the best-selling phones of all time, with over 250 million units sold. In more recent years, the Nokia Lumia series, powered by Microsoft's Windows Phone operating system, gained a ...

It launched its Windows Phone smartphone OS in 2010, and its own Surface lineup of tablets in 2012. The Redmond, California based company completed its acquisition of the Nokia Devices and Services ...

It launched its Windows Phone smartphone OS in 2010, and its own Surface lineup of tablets in 2012. The Redmond, California based company completed its acquisition of the Nokia Devices and Services ...