Since my KitKat 4.4.2 update I have noticed that, when the screen is locked and I am using my bluetooth to initiate a phone call, that S-Voice no longer comes up, but Google Voice Dialer does instead. The Google Voice Dialer does not seem to work as well as S-Voice and does not automatically turn my screen off when the call comes to an end. Has anyone else had this problem? Does anyone know how to disable Google Voice Dialer when using me a Bluetooth headset? Any assistance will be greatly appreciated!!