It's rumored to be called the MyTouch 3G HD, and it looks remarkably similar to the
However, there are a few noticeable differences, one being a larger screen, which appears to be around 3.7 inches or larger. At that size, I would expect to see an 800x480-pixel screen resolution and possibly a camera that records 720p video.
If you look closely, you can also make out what appears to be a front-facing camera located near the top of the phone. HTC has created all of T-Mobile's MyTouch phones to date and it also happens to be the company behind the Evo 4G, which also bears the feature. Popularized by Apple and the FaceTime application, front-facing cameras could become a staple of high-end HTC handsets.
From this angle it's tough to tell whether this device has a sliding QWERTY keyboard underneath. If it does, this could be among the slimmest designs to feature a hard keyboard.
Internal specs are sparse, but the MyTouch 3G HD could be T-Mobile's first HSPA+ handset. Recently, the carrier tweeted that it would introduce a HSPA+ smartphone in the coming weeks, and to add to the speculation, a recently leaked roadmap hints at a Project Vanguard device manufactured by HTC.
Listed with a September release, it's likely these are connected, whereas themight end up as the Project Emerald due in November. Regardless, we should be hearing something shortly as I expect the carrier will want to spend a few weeks rallying excitement and gathering preorders ahead of its launch.