My service provider couldn't even help me with this! So in case no one has answered this yet ,,, to turn off the key pad tones (very annoying sound) select menu>settings>profiles, then with 'normal' selected, hit the 'options' key (upper left soft key), then 'customize'- set up your audio profile the way you want it - go down the list til you come to 'key volume' and turn that all the way down with either the side control or the navigator dial. That will turn off those annoying key tones so you will bother other less while you use your phone in public.
Hope that helps.