My mic does not seem to be working when using speakerphone or on facetime, but normal calls work fine. I can hear the person speaking over facetime, but they cannot hear me. I was able to use my headphones mic to talk over facetime, but I'd hate to have to use that everytime. **Also, I just did the voice memo and the mic worked fine. Is there a setting I have messed up? This is weird. **Another test, video playback only produces noise, you can't hear me talking at all. Anyone have any ideas? If I took this to the apple store, would they just replace it?