Wow my thread's still alive hehe..
The first replacement was due to dropping calls in my apartment where my 3GS worked fine, as well as dust under rear glass.
Second replacement is because first replacement had same signal issues along with dust under front glass. I resigned to the fact that I have an ip4-dead-zone in my apartment, but was now stuck with a worse cosmetic problem.
Now I'm actually in love with this 2nd (mail in) replacement. Cosmetically flawless and its only issue is the signal, which I've isolated as only being an issue in one corner of my apartment, downstairs, when I'm holding the phone in my left hand death-grip style (with or without case). Everywhere else in the apartment I'm fine, and I actually recall dropping one call on my 3GS in that same corner. I have home phone service, so it's not too big a deal, and I plan to press AT&T for a Microcell.
Wish I could tear myself away from these forums and just enjoy my new phone. For all practical purposes, when I'm not trying to replicate an issue, it works flawlessly. I guess all the Apple gossip has become my new past-time, like a gadget nerd's soap opera... Or a train wreck you can't look away from.
Only thing I really have left to worry about is when the white model comes out, because my wife is waiting on it and is insanely jealous of me. She was actually the only one who was supposed to get the upgrade since she has a 3G and I had the 3GS, but when AT&T bumped eligibility I convinced her we both needed an ip4.
