Editors' note: This article was originally published October 13. It has been updated throughout.
A teardown by iFixit and analysis by iSuppli, Chipworks and others reveal the iPhone 4S as a mini version of the iPad 2 in many respects.
Camera: A Sony CMOS sensor, according to Chipworks. Overall, camera is 8 megapixels, 60 percent more pixels than the camera on iPhone 4. A larger aperture (f/2.4) and new sensor. Better in low-light conditions. Video at 1080P, 30 fps.