Some people feel dial pad touch tones to be annoying. Ok, no problem. It is easy to get rid of these touch tones in Android KitKat 4.4.2 smartphone.
To enable / disable the touch tones, just follow the instructions:
Command Line: Phone Dialer > Settings > Call Settings > OTHER CALL SETTINGS – Dial pad touch tone.
1: Tap the ‘Phone Dialer’, available on Home screen of your smartphone to open up the ‘Phone Dialer’ screen.
2: Tap the ‘Settings’ button, available in the right bottom corner of your Android phone. It will open up a popup menu.
3: In the popup menu, tap the ‘Call settings’. 
4: At the ‘Call settings’ screen, see the ‘Dial pad touch tone’ under the OTHER CALL SETTINGS is not checked and is disabled. 
5: Tap to check the ‘Dial pad touch tone’ and it is enabled. 
6: To disable the dial pad touch tones, reverse the process, given above.
That’s all!