I would go out on a limb and say if you bought your phone for the low-light picture taking capability, you made a major error. I barely get good low-light shots from my actual camera, and in no way expected my phone to be any better. Daylight pics are awesome, clear and again, considering the camera is not the "phone's" primary function, I am more than pleased.
Yes, technology has advanced since the first days of a camera on out phones, but the phone makers aren't keeping up quickly enough to improve camera quality up to expected standards.