I have a first gen iPhone 4. When they first came out, it took me four different phones along with Apple doing numerous software upgrades to get a phone that functioned reliably (for the most part) for the better part of the last year. I was initially plagued with the same drop call syndrome...

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...