Microsoft's new release of the Windows Phone mobile OS, 7.5 or "Mango," is getting some good reviews. The new OS version, with its distinctive, fluid Metro UI, features hundreds of changes, including more dynamic, and more customisable "Live Tiles" (shown). Some of the "new" Windows Phone 7.5 devices will be the existing models that download Windows Phone 7.5, formerly dubbed Mango. But a new crop of phones to exploit it are also starting to appear, here and abroad. Here's a quick overview of them. In most cases, prices have not been announced.