However, it does have its shortcomings i.e. a Bluetooth music bug and no access to the Windows Marketplace as well as low speaker volume when in-call. But – it is Windows Phone on your ancient HD2, which is already a feat in itself. If you’ve got some experience hacking your HD2 phone before, you can head over to XDA-developers for links to the files and instructions on what to do to upgrade your phone. Give it a shot and let us know how it goes! As usual, be sure to backup your phone and make sure you know what you’re doing beforehand.