Today, the mic on my Galaxy S3 decided to stop working. People call me and I can hear them but they can't hear me. Tested the mic with the voice recorder and, if I yell, you can BARELY hear my voice (kind of muffly and scratchy). Tried rebooting, turning off noise reduction, etc. No help. Here's the weird thing: When I tap the phone body or scratch the mic with my fingernail, THAT sound comes through loud and clear! The V/U on the voice recorder pegs out when I tap the mic with my finger. Voice doesn't register though! I listen back and the tapping/scratching sounds crystal clear and loud. I've got to get this fixed asap. Any ideas???