Talking Dialpad with this application when you press on ur dialpad to dial a number and hold a key for instance 1-9 including * and # that the phone will actually say the number out loud and also when you have a call waiting it could play an mp3 in your own ear instead of beeping. It basically just adds keys to the registry to play an mp3 when u press and hold a key.

The keys that needs modification are

HKCU\ControlPanel\Sounds\Dtmf#
HKCU\ControlPanel\Sounds\Dtmf*
HKCU\ControlPanel\Sounds\Dtmf0
…..
…..
HKCU\ControlPanel\Sounds\Dtmf9

will have to change the key for each of them

“Sound” (string) = %CE19%\Sounds\1.wav

the sounds should be in .wav/.mp3 format and should be placed in

\Application Data\Sounds

Please make a backup of the Registry before you make these changes or install the .cab file posted here, so if any thing goes wrong you can restore the Registry Keys.

Source : xda-developers.com

Talking DialPad

Check out more : Windows Phone Apps | Windows Phone Games