If you have bought a HTC Touch Diamond2 in Asia, a new ROM upgrade is now available from HTC support site. The new ROM updates has an upgraded Radio, with a new radio version 3.44.25.27. The new ROM version is 1.40.707.1. While it is not sure if the new Radio will improve the reception or the battery life, please note that each ROM upgrade will required a data backup and restore. Check out the download details here