So I went to the local Apple Store, and decided to play around with the iPhone 4. I heard it is very scratchable, so I used my fingernails to scrape the back a few times. No scratch mark. I then decided to slide it on the wooden table. Still no scratch mark. Finally, I took the sharp corner of the plastic display showing iphone stuff and rubbed it on the iphone. Still no scratch mark. I used my fingers and fingernail to feel the back and front, and it feels fine. Basically, 1) how do you scratch an iPhone 4 (other then something along the lines of taking a paper clip and scraping it), and 2) do you think the display models are made purposely more durable? P.S: All the display iPhone 4 has the dropping bar bug.