Hot on the heels of our first peek of the T-Mobile-branded HTC Radar 4G, the Windows Phone device has been spotted making its way through the United States Federal Communications Commission. Going by the model number PI06110, the Radar 4G is packing support for the usual GSM/EDGE/WCDMA bands, including the 1700MHz band used by the Magenta Army.

For those of you that'd like a spec primer, the HTC Radar is packing a 3.8-inch 800x480 display, 1GHz core, 5-megapixel camera, 720p video capture, VGA front-facing shooter, and Windows Phone 7.5 Mango. Something we don't know quite as much about is the Radar's release date, but now that it's passed the FCC, it's at least one step closer to hitting T-Mobile's shelves and our pockets.

Via TmoNews, FCC