Display experts DisplayMate put the iPhone 5 display through its paces and walked away pretty impressed, ranking it the best smartphone display they have ever tested. A lengthy analysis confirms that Apple improved upon pretty much every aspect of the iPhone 4/4S display. No longer are colors undersaturated and brightness doesn't drop as much when looking at the iPhone 5 from side.
Moreover, the display on the iPhone 5 has excellent calibration plus accurate color and contrast. Overall, DisplayMate rates the iPhone 5 display as "A" versus "A-" for the iPhone 4 and "B+" for the Galaxy SIII...