If you are already on a phone call, Call Waiting allows you to see details of another incoming call.
You can choose to:
End your current call and answer the second
Put your first caller on hold while you answer the second, then return to your first caller again
Answer the second call and switch between both callers
Reject the second caller
To activate call waiting dial star43hashcall .
To deactivate call waiting dial hash43hashcall .