An anonymous reader writes that Microsoft says the Windows 10 Mobile upgrade will begin early next year. The company had previously promised a roll out this month. Venturebeat reports: "Windows Phone fans and fanboys have a tough job. They have to stand by an operating system with a new name every few years, significantly fewer apps than the competition, and a distant third place spot in the market. The latest news out of Microsoft isn't making their lives any easier. This week, Microsoft failed to deliver on its promise of rolling out Windows 10 Mobile devices to existing Windows Phone devices in December. The new target? 2016."