IPhone 5 makes calls but can't hear the person and they can't hear me
Recently my Verizon iPhone 5 will make calls but I cannot hear the other person and they cannot hear me. I have restored the phone as new through iTunes and reseated the SIM card, and the problem still persists. I have tried turning on speakerphone and still nothing. I have tested the earpiece and microphone and they both work for FaceTime audio calls and listening to voicemails. The phone is currently out of warranty, and am in need of help! Everything else works fine on the phone, such as data use and text messaging. Thank you for your help.
iPhone 5, iOS 7.1.1