In the wake of the unveiling of Windows Phone 7, many are wondering if the smartphone they are using now will be upgradeable to this new operating system. According to a Microsoft executive, the answer is simple: no.Windows Mobile 6 and earlier gave device makers a wide range of options, but the next version is a major departure from previous practices, and Microsoft has set some rigid hardware requirements. Requirements that  exclude every current model.Natasha Kwan, who is in charge of Microsoft's Mobile Communications Business in the Asia-Pacific region, made this clear in a recent interview: “Because we have very specific requirements for Windows Phone 7 Series the current phones we have right now will not be upgradeable.” Read more here: