Jihosoft Phone Transfer can help you transfer contacts from Samsung Galaxy phone to new iPhone 6S/6S Plus. This tool is very simple to use. All you need to do is connect both your old Samsung phone and new iPhone to computer and then perform several mouse clicks.
it may be in a qualcom usb mode... try this code. *#726872#.. it will says Samsung usb..... etc plz connect cable.. connect ur data cable and start ur pc studio, it will work..
In order to check your mobiles capability to modulate sound just put your headphone. If you are able to hear the speech through headphone then the problem is with your speaker. If unable to get the speech the problem is with main pcb itself and to repair that you will have to go to service center it will be costly but if you are able to hear through headphone then it will be cheap.