If you’re still hanging on to your HTC HD2 unit, know that you can replace Windows Mobile with Ubuntu or Android, thanks to a recent hack detailed by the folks of XDA Developers. You can also learn more about it from this YouTube channel, belonging to one of the guys who made this work.
Android looks pretty fluid on the smartphone, while Ubuntu takes a while to get used to and handle on the handset’s large touchscreen. We have to mention that these releases won’t mess with your internal flash, as all changes made in Linux are stored inside files on the phone’s memory card.
A soft reset will take you back to Windows Mobile 6.5.