Oh, you're right. I used the PPI Calculator. And if Apple were specific of having 326ppi then it must have exactly 325-327ppi...which brings me to my next point. The iPhone 4 (and probably 4S too) don't have a 3.5 inch screen. They have a 3.53 inch screen: an additional 0.03 inches than stated, only rounded down for Marketing. Besides, Steve Jobs was wrong. To have a "Retina Display" you actually need a ppi of greater than 476, at a focul distance of 12inches from your face. If the distance is shortened (closer) then you potentially need even more pixels (thus higher ppi) for "Retina Display" until you hit the "dropzone" which is about 2 and a half inches when your eyes can't focus well anymore (it blurs) so the ppi for "Retina Display" figure drops greatly. Actually, the screen found on the iPhone 4, 4S and iPad 3 are IPS LCD's and are one of the best in the industry in-terms of many features. It's like comparing two 32in 1080p TV's, one from Samsung and another against a nameless Chinese OEM...its obvious the Samsung is superior thanks to better aspects (colour reproductivity, speed, transflection, viewing angles, black ratio, brightness, colour temperature etc etc)