What we have here is the new Windows Phone 7.8 / Build 7.10.8835.35 for HTC HD2 (HTC LEO)!
This ROM is cooked by the well known developer Ansar @ XDA-Developers and of course is fully unlocked (dev/interop + latest unlock from Cotulla and Ansar), so any custom or unsigned apps (XAP files) can be deployed to the device.
The ROM is pre-loaded with some of the best Windows Phone apps and utilities up-to date such as:
Leo Manager V 2.0
AT&T code scanner
Instant Wi-Fi wake up from stand-by
Two touch drivers included
Unlocked registry editor
All hidden ROM features enabled
Improved in-call and speaker volume
Static MAC address
+ many other apps and tweaks
Download the latest Windows Phone 7.8 ROM for HTC HD2 – click here.