same problem here
Sorry to reload an old thread, but I'm having the exact same problem. I have an iPhone 5, and now my Phone app is having the same problems. iOS 7.1.1, 64GB model.
If I answer an incoming call, I can't hear the caller, and they can't hear me. There is zero sound in/out of this phone through the mic/speakers. However, switching the call to speakerphone works normally. Also if I plug in headphones, it works.
All other audio apps work fine though (recording apps, music, etc), so it's not (or doesn't seem to be) a hardware problem.
Thanks for any ideas. This is a replacement iPhone 5 I got in Sept 2013, because my first iPhone 5 had the "purple spots in all photos" problem. :roll eyes:
I don't have Applecare, and there's not an Apple Store in my province (so nearest one is like 10 hours away).
Thanks.