The Windows Phone 7.5 ROM for the HTC Mozart handset has been leaked.
The ROM is available on the XDA-Developers forum. The ROM will upgrade the European HTC 7 Mozart to build 7720 (the final version) of Windows Phone 7.5 'Mango' and includes the relevant OEM customizations.
Languages available in this ROM are:
It does work ... here's the proof over on WindowsPhoneReview.com:
Interested? Well, if you are I can't offer enough in the way of warnings. This ROM is not being offered through the official channels and if things go wrong, you are very much on your own!