When talking to anyone on my Droid Razr HD, there are complaints from them that they can not hear me clearly or that I am sounding muffled. This has continued to happen ever since I purchased my phone a couple months ago. Is there a known reason for this, are there others with similar problems, or could it just be my particular phone? It is frustrating to have to repeat myself multiple times and even more frustrating because I am the "tech guy" who doesn't have flawless and awesome, working technology.