This patch helps you
disable the audible tones that you hearcustomize the feedback(audible & haptic), that one recieves when using the dialpad or the physical keyboard, to dial a phone number in the Phone application.
There are/were similar patches available for prior versions of webOS. However, since the Phone application was rewritten using Enyo for Pre3, the old patches do not help.
This patch has been tested on webOS 2.2.0. Please post back your results.
If you used and liked the patch, a simple Thanks would do.
Or if it meant something more to you, you can