Greetings,
I have experienced this issue over the last four months. I have had five (yes that is 5) Motorola Droid phones, all have had the same issue, muffled sound on other user end, echo and static on my end, etc. Verizon could not resolve the issue and replaced my phone last week with the HTC Incredible. Ha, now I have signal issues, frequently dropped calls, no signal or 3g connection. I am starting to believe this is an operating system issue. I have never experienced these problems on my old Moto flip phone and my other two lines have no issues. How chaotic and frustrating this is because I simply love the Droid platform.
Jeff