The HTC HD3 is likely to be launched on the 18th of October and will be the welcomed successor to the Windows Mobile powered HD2; no surprise therefore that it will be based on Windows Phone 7.
Codenamed 6HTHD7XM, the device has already appeared on the backend system of O2 in the UK, which interestingly lists Alcatel PAYG handsets as well.
Engadget, who broke the news, doesn't provide with more information but earlier in July, Digital Review said that the phone would come with a 4.5-inch AMOLEd touchscreen (with a resolution of 1280x800 pixels), a dual core 1.5GHz ARM-based processor, 1GB RAM, 32GB storage, Wi-Fi, 4G, a 8-megapixel camera with two LED flashes, HDMI port and HD recording capabilities, a 1800mAh battery, all in a 10mm thick enclosure.
We're slightly dubious about the specifications from Digital Reviews but until we actually get the phone on O2's website, that's the only lead we have.
The HD2, which is still on sale, has the biggest screen currently on the market and still commands monthly contract prices of £35 and more.