HTC has recently rolled out a new firmware update for the Windows Mobile-based HTC HD mini, however only certain HD minis should be updated.
Full details regarding the update are unknown, however HTC has apparently improved the way that the handset handles sound when in a call.
If you want to update your HD mini make sure you are running a firmware version of 1.36.XXX.X or older, also if you are own a Vodafone Spain version do not update.
If you would like full instructions on how to install the update check out this link, as we always say ensure that you have backed up important data beforehand.
Have you installed this update? If so, was it worth installing?