Apologize for my English first.
I've got two problems with the built-in camera: 1) whenever I tried to take photos, the lightness of the screen kept changing. I thought it was because I didn't hold the iPhone stably. But the problem remains even if I put the iPhone on the charger with the camera turned on. I didn't touch anything, the lightness of the screen just turned from a little darker to lighter and vice versa. 2) whenever I used the camera at night, I could see shadow waves across the screen. (I don't know how to explain this, it is like what happens to the computer screen when you watch it on the TV).
Anyone has any idea if this is the hardware problem? Should I go ahead ask for replacement? But I will have to wait for iPhone Dev's relock tool before I go...