The HTC Touch Pro is HTC's 2008 entry into the Windows Mobile Smartphone market. It has a little brother, the Diamond, which does not feature a slide-out keyboard. It has been "outdated" by the Touch Pro2 which is now available for sale and does away with the D-pad in favor of a bigger screen. The Touch Pro features a 2.8" VGA resistive touchscreen and a slide-out keyboard. The main operating system is Windows Mobile 6.1 but many users have used custom 'cooked' ROMs and updated their devices to the latest Windows Mobile OS (6.5), even though the Touch Pro is not