From Gizmodo, take it with a grain of salt. http://gizmodo.com/5570742/first-iphone-4-scratch-on-its-ultradurable-glass-wont-be-the-last When the iPhone 4's screen was shattered, people said that the test wasn't valid, and Apple never claimed that the screen was completely crash-resistant, anyway. Only scratch-resistant. But it seems that "30 times harder than plastic" is still not scratch-proof. In their advertising, Apple says that the iPhone 4's aerospace-grade glass is "Chemically strengthened to be 20 times stiffer and 30 times harder than plastic". According to them, "the glass is ultradurable and more scratch resistant than ever." But, they said it's 30 times harder than plastic, not 30 times more scratch-resistant than plastic, meaning that "more scratch resistant" might mean just 1 or 2 times more. Who knows. In his review, Walter Mossberg agreed. He said that he tried to break it and scratch it, and he couldn't do it: I dropped it several times from a few feet onto a hard surface with no problem, and it acquired no scratches at all in my testing, even though I didn't use a case or coddle it. But as this photo shows, he really didn't try hard enough. Gdgt editor Ryan Block didn't even try to scratch his, but he got a scratch anyway: Just spotted on the iPhone 4's supposedly nigh-indestructible glass: scratches. Seriously. Not good! Of course, Apple's own claim was not to be scratch-proof, but scratch-resistant. The iPhone 4 might be more so than the previous iPhones, but that doesn't mean you should be throwing it around, or putting it in the same pocket as your keys—it can still scratch. [Twitter] Send an email to Jesus Diaz, the author of this post, at email@example.com.