The post above completely answered the question. Autofocus really makes the camera worthwhile on a high-dollar camera phone. I've owned many phones, with and without AF, and will NEVER buy another one with it. It makes a world of difference.
I have only used the D900, 903SH and K790a out of those phones. The 903SH and K790a are about neck and neck when it comes to image quality. The D900 is at the bottom, which still makes it better than 99% of the camera phones out there.