How to stop getting sound of another phone call have a Samsung G7 and am getting much problem with the call waiting...

I want to know if it is possible when am on already on a phone call and another person phones and the person with whom am taking is getting the sound of the another one phone call. Thus I want to know how to remove the sound when the another person is calling..
You can disable "knocking" at all – so that the second caller gets a "busy" signal, and you a "missed call" notification. If that's what you want, depending on your device the setting might be in the phone app:


open the phone app
tap the overflow icon (the 3 stapled dots in the upper right corner)
select Settings
chose Advanced Settings


There you should find the option. If it's not there, an USSD code can toggle that:


open the phone app
pretend you want to make a call to the number #43# (enter that code and tap the call button)


Now it should be turned off. If you want to turn it on again, use *43#, to check the status *#43#.