966.7% more mega pixels (MP) on main camera than Zen Ultrafone 503 3G. More main camera resolution means better picture quality and detailed photos, which will look sharp on a large screen. (3.2 MP vs. 0.3 MP)
126.0% bigger screen size than Zen Ultrafone 503 3G. The bigger the screen size is better the user experience of reading and watching movie or video songs. (4.0 Inch vs. 1.77 Inch)
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