Photo editing will arrive on the iPhone 3GS with iOS 5
iOS 5 brings photo editing to our iPhones; we can crop them, automatically enhance them by pressing a button, or remove red-eye from a photo taken with flash.
Rumors said that this would be one of the features that would not be in the iPhones 3GS and that the iPhone 4 and iPhone 5 would be the only ones to enjoy it.
But this option has finally appeared in the latest betas, so if you have an iPhone 3GS you can rest assured, it still has plenty of life left with iOS 5.
This is what the retouched photo looks like

