The HTC Radar 4G is T-Mobile's first Windows Phone device to debut with Mango and the carrier's first one with HSPA+. More importantly, it's also the only Windows Phone T-Mobile is currently selling and seemingly the only smartphone in its library that isn't black or dark gray. The 3.8-inch slate has a sturdy aluminum build with a smooth plastic bottom, a Super LCD screen, and 5-megapixel camera. Is that enough to make it stand out over its Android competition on the carrier? Read on to find out.