Any time I try making a phone call there are no ringing sounds, just silence. The screen shows that a call is active indicated by a running clock, but there are absolutely no sounds. Also, when I receive a phone call, I answer and there is just silence. Texting and data services work fine, it's just the phone that is totally useless. Any suggestions?
Have you used an [attached] headset, ear bud, etc? If so, try inserting/removing the jack a few times. Sometimes, the tiniest piece of trash can get inside the headset port - and the phone "thinks" there's a jack inserted, even after you've removed it. Amazingly enough, I've seen this issue at my workplace - twice it was solved with this simple procedure. One phone, however was defective and required warranty replacement.
Hope it helps