A few weeks ago I woke up to 2 pieces of dust under my iPhone3GS screen. I originally thought they were dead pixels, but I still notice them when the screen is off. Today I noticed a 3rd piece of dust, it's especially noticeable when web browsing or using an app that doesn't have a dark background. I've read that people have been able to swap their iPhones for a new one for this very problem at the Apple store. Do you think 3 pieces of dust under the screen is enough for a new one? I'm upset because it could hurt the resale value, I plan on selling this and getting the new iPhone in the summer. My last question is would I have to bring it to an Apple store? The closest one is 45 minutes away, but the AT&T store where I bought it is 10 minutes away. Would AT&T perform the swap, or would I have to bring it to Apple? Thanks!