Buy a camera.
Why anyone expects to find a good camera shoved into something as small as the iPhone is beyond my understanding.
Then you understanding is lacking.
Other manufacturers can produce very very respectable cameras in devices that are infact smaller in volume.
A friend has just retired off the 12 month old 5 megapixel equipped phone he replaced it with a new version of the same thing (his provider offered it). I used it - it took DAMN good photos, and 640 x 480 movies that even looked great on a TV.
People need to understand that the iPhone is underspecified. It's camera and it's facilities are massively under-par.