How can i Silent All Buttons ?Call-End Call Buttons ..

[Guest ASDIOMNASD]

I want to silent, those 2 buttons, when i press Call button and End Call Button i hear a "Bimmp" sound , Can you please help me remove the sound? I think there is something with hte registry but i dont know

[Guest rigor.m]

settings...personal...sounds and notifications... uncheck "hardware buttons"