I am on my 3rd iPhone 4, 1st new, 2nd refurb, third who knows....., theoretically it was new from Apple. I won't go into the litany of problems I have had, suffice it to say extreme and numerous. But in all three phones, I have had the bluetooth drop out, garbled, muffled and incomprehensible audio. Probably 90% of the bad audio is on my callers end, not what I hear. I am experiencing the very same things mentioned by everyone in the forum. I have tried numerous hi-end $$ bluetooth headsets (Jawbone, Plantronics, SoundID) and they all have the same problem. With my old original iPhone, I could walk in other rooms with out the phone and only experience scratchy audio and not lose connection unless I went beyond 35 or 40 feet. Now, I can have the phone in my shirt or pants pocket and it will lose connection. And, people I am talking to in all conditions 75% of the time report "echoing" on their end. I am praying Apple with be able to figure this one out and fix in a software update. I am totally dependent on bluetooth headset use. I refuse to plant any phone on my head. I have heard good results now with the new Blueant Q2, and may pony up just to see if it helps. I am getting tired of recalling, and making excuses on the majority of my calls. Come on Apple, this is no small problem. Acknowledge, analyze and fix the problem. No free case is going to fix this problem.