Taiwanese mobile phone maker HTC Corporation is expected to be among the first vendors to come to the market with handsets running under Microsoft's new Windows Phone 7 operating system, and the long rumored HTC HD7 is one of the first such devices in the company's lineup.

Originally leaked into the wild under the name of HTC HD3, this Windows Phone 7 device has just received the necessary approvals from the Global Certification Forum, and also emerged in what seems to be the first photo showing it with T-Mobile branding all over it.

Most of the specifications HD7 comes to the market with were already brought to light, but little is known so far on the mobile phone's actual market availability.