Apple iPhone 4. Very sharp pictures for a phone comparable with point and shoot cameras – pictures have a lot of details. And even when there is little light you can still get decent pictures. However, the white balance auto settings are awful and even under natural light in cloudy conditions all pictures are bluish and indoors it makes all pictures yellowish.
Apple iPhone 4s. It is a lot better under lamplight when its predecessor: fluorescent or incandescent, cloudy conditions – nothing embarrasses it. And if there is enough light it provides a rather high level of details. Low light condition photos don’t suffer from too much noise thanks to its noise reduction system but it loses the smallest details as a result. All in all, it’s a very decent camera.
HTC Sensation. Very sharp pictures regardless of lighting levels for a phone. Amount of noise in low light conditions is minimal and barely visible. It does well when it comes to colors too, naturally, it is not nearly as good as regular point and shoot cameras but for a phone its quality is impressive. There is an issue of uneven sharpness on the edges of photos but it is probably a defect of this specific unit.
HTC Titan. Pictures are very sharp in the center but edges are a lot more blurred – this is a frequent flaw of compact lenses. White balance is set correctly most of the times even under lamplight. Color rendition is accurate and natural. However, in cloudy conditions pictures it makes are too cold. in low light conditions noise reduction works correctly – there is very little noise and pictures remain sharp.
Nokia N8. Sharpness of pictures is on a par with regular cameras. It preserves small details in the center and on the edges equally even in low light and it’s the strongest side of this camera. But color rendition is not that good – it demonstrates one of the poorest white balance stability. It often sets white balance incorrectly in lamplight thus altering hues in the picture. However, it does well in sunlight.
Nokia N9. It is better than N8 in terms of sharpness and white balance auto settings (it still makes mistakes but not very often). However, it makes all pictures slightly colder but it is almost an upside as there is no yellow hue on indoor pictures. But outdoor pictures might sometimes be too cold.
Samsung Galaxy Note. Pictures are very sharp even with insufficient light. This camera is very close to low range point and shoot cameras in terms of quality. There are some issues with color rendition: in lamplight it often adds yellow and pink hues to your pictures. White balance is not always accurate but outdoors this camera is good.
Samsung Galaxy S II. The picture pattern is very similar to Samsung Galaxy Note and it has got same white balance issues in lamplight and it also makes near perfect images outdoors. But as well as HTC Titan images are less sharp at the edges as a result of cheap lenses.
Sony Ericsson Ray. Very stable auto white balance even in difficult lamplight conditions. There are not that many details. Image sharpness is a bit lower than point and shoot cameras provide but it is very good for mobile cameras and it is even across the picture.
http://mobile-review.com/review/camera-test-en.shtml