One of the biggest improvements for the iPhone 3GS to the iPhone 4 was the screen. The AH-IPS panel that the iPhone 4 uses is much better than the older screens. A company called Intertek has pitted a 4.3-inch Super AMOLED display from the Galaxy S2 against a 4.5-inch AH-IPS Display like the one Apple uses on the iPhone. The IPS display has 720 x 1280 resolutions at 392 ppi with the Super AMOLED at 480 x 800.
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