HTC Quietly releases update for HTC Touch Diamond2.

HTC never post much details about the updates on their website. All I know is that the update affects SMS and "amends the internal management of SMS functionality, and enhances SMS transmission stability" It's pretty vague.

Anyway, the update applies to ROM versions between 2.51.xxx.x to 2.54.xxx.x

Download the update on HTC's Support site.