I have no advice for the OP, but do know how you feel. My six month old TP2 just went mute on me too. I thought I lost my mind. Nobody could hear me, but I could hear them fine. It also works perfectly via bluetooth.
I'll be visiting my friendly Verizon store tomorrow morning for a replacement. I do have the overpriced insurance, but still believe the deductible is $50-100.
- Dave