T-Mobile USA, today announced the upcoming launch of the HTC HD7, one of the world’s first smartphones using the Windows Phone 7 operating system. Pairing rich mobile multimedia features with a 4.3-inch touch display – the largest screen available on a Windows Phone in the U.S. – the HTC HD7 promises to keep customers entertained and connected on the go.

The HTC HD7 is the first phone from T-Mobile built on Windows …