Because it is a very low resolution camera. It works best in bright light, but even then is mediocre at best. Better cameras started with the iPod 5.
Make sure the lens is clean. Unless you have optimun light, the still photos quality of 4G phtos is poor/grainly
Man do not insult our intelligence, i know whats software error. with saves ssh lobs returned to ios6, works perfect, upgraded to 7 it happend again, so deal with it: iOS 7 HAS A BUG!
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