Have you verified the silent switch isn't turned on?
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
I believe Ann154 gave you a proper answer.
Considering you are hyjacking another posters issue.
Settings-Do Not Disturb
Make sure it is not set on (green tab) also make sure the Receive calls from everyone is selected.
What Ann154 was referring to is make sure the mute key on top left side is not showing red, as it will mute all calls.
Additionally post your iPhone issues at http://www.apple.com/support