Are you annoying by the loud camera shutter sound and set to silent mode or volume off did not fix the problem?
Here is simple way to disable it, but your phone need to be ROOTED.
1. Download Root Explorer
2. Run Root Explorer
4. Click on the [Mount Button]
5. Rename "Shutter_01.ogg" to "Shutter_01.ogg.off"
6. Reboot your phone. DONE
Try take a picture. Even with sound ON, your camera shutter will not make any sound :)