Don't you like your Pocket PC to vibrate instead of beep sounds for every key press on the Dialer pad? If yes, then download this file and install it. Its just a 3kb file which makes a little registry modification to do the hack. Works on most Windows Mobile Pocket PC devices but make sure you have keypad short tones on for this to function. And you can simply disable this option by turning it off in case if you find this vibration annoying anytime later.