Hi, Yesterday I've exchanged my 4S due to faulty home button. After taking off protective film from new phone I instantly discovered different tint color under the glass. It is like extra layer of greenish tint underneath the glass, and I'm 100% sure this filter was not present on my previous 4S, which I got the first day they came out. Today I noticed that this greenish tint helps a lot as it's serving as antiglare filter under the direct sunlight, and visibility is so much better than before!!! I'm very curious why my previous 4S didn't have it and if anyone noticed this before? I thought all of them should be the same but they are not, and I'm very happy with this new one!