Update: Checkout our HTC HD7 review.

Among the first smartphones using the Windows Phone 7 platform is the HTC HD7. The short of the technical specs is a 1GHz processor, large 4.3-inch display, Bluetooth and Wi-Fi, TeleNav GPS Navigator, 8 or 16 GB internal storage and a 5 megapixel camera with autofocus and dual LED flash.

That’s the largest screen on a Windows Phone yet, although word is that color rendition and resolution aren’t as great as the physical size itself.

In the words of Jason Mackenzie, president of HTC Americas: “With its huge, vibrant display, high quality sound and built-in kickstand, the HTC HD7 smartphone is the ultimate device to enjoy the outstanding entertainment services made possible by Windows Phone 7.”

He’s referring to the entertainment services that comes prepackaged with the phone – Netflix, for movies; T-Mobile TV for access to programming from various networks; Slacker Radio with its 130 stations; Zune and Xbox live for games and media.

To access all this you’ll be using T-Mobile’s broadband network. For business and production the HD7 boasts the largest virtual keyboard on a Windows Phone, and Microsoft’s Office Hub, which includes mobile versions of Word, Excel, PowerPoint, OneNote and SharePoint Workspace.

We don’t have room to explore these here, but if you’re looking at a Windows Phone 7 like the HD7, there’s two things that set it apart from other systems. It uses Live Tiles, which give you updates to everything on your phone straight on the main screen, think of it like an operating system version of Facebook’s HUD. And there’s Hubs, which syncs apps and services between devices, and allows you to display all of them on the relatively generous 4.3 inch screen, in a sort of Command Screen interface.