that you check your notification settings as you might have your ringer notification set to "vibrate only". You could take it to an Apple store or your carrier for troubleshooting if that doesn't work. Worst case, could be a warranty or damaged issue. Good luck.
My phone stopped ringing and alert sounds stopped. Ringer is on , alerts are on, DND's are all off. If I test the ringer and alert sounds they work loud and clear, but call me, or send a message, and it only vibrates. I have also done a hard reset ... twice. Not positive, but I think this started right after 2 updates ago. Another one shortly after and I hoped that would fix it...but no.
Any ideas out there? Thanks.