The 3G iPhone Japanese Version Preverts Obscene
The Japanese version 3G iPhone enabled shutter which will make sound whenever a picture is taken even in silent mode, it is supposed to deter voyeurs from taking snaps of obscene & unfair pictures up women’s’ skirts — or down their tops in a public place. However in Japan this is nothing new technology because most of the cell phones come with such features.

Photo Source: Gizmodo.com
As per Nobuyuki Hayashi, a tech reporter based in Tokyo “the camera of the iPhone 3G sold in Japan will make a shutter sound every time you take a photo, even if you put the telephone in silent mode”. Read more at [ Gizmodo ]
