first save all your contacts,photos,videos what ever you want then go to settings click on reset button and the select master reset. the E or edge network symbol will be removed forever in your samsung mobile.
On the rear of your TV connect, with a phono/RCA cable to the Audio R + L sockets, connect the other ends to your Yamaha using the TV in sockets. See photos attached
Hope that helps. HDMI is for video unless the extra pins are added for audio.