We have seen quite a few leaks regarding Windows Phone 8 features and hardware, but the 7.8 update has been more elusive (ignoring the obvious fake a few days ago). That all changes today, as XDA user dotcompt has released the first Windows Phone 7.8 ROM for the HTC HD7.

As of right now, it is strictly for the HD7 and not any other 1st or 2nd generation phones though a port is possible. What we know so far is that the build number is now 7.10.8835.35, and dotcompt says the bits were dumped from a Nokia device running Tango. Windows Phone Hacker has given us a quick hands-on video of the 7.8 ROM in action (watch it after the break), and it includes the new Start screen as well as one new feature: a new 'Share' option when you long press on an app in the app list. Unfortunately, the option was grayed out so we don't know what that feature is.

The ROM is said to be unstable, most apps downloaded from the Store don't launch, and there are more problems that make it evident this is only for those with the patience to deal with unfinished software.


Update: Jaxbot is working pretty darn quickly today, as this previously HD7-only ROM is now up and running on his own Samsung Focus (pictured). Apparently he had to cook this up himself, so don't expect the download for this Focus-specific version right away.

You can learn more and download the ROM from the source link, and remember to head on past the break for a first look at the 7.8 update in action (on a broken HTC HD7, but nonetheless).

Source: Windows Phone Hacker, XDA-Developers