hi iphone users i have had the same problem with the no sound issue i have a little tweek that will gain all sound back on any iphone it worked for me heres what to do if it works for you let me no because ino its a nightmare having a phone with no sound 1st thing go to settings general accessibility scroll down assistive touch click it on when you get the white dot click on it you will have 4icons click on the device 1 you will then see volume up and down and also have little bell make sure volume is up and the bell is not muted there you quick fix for sound also you dont have to keep the assistive on you can then turn it off you will have all sounds incoming call the lot enjoy hope it helps