Note 2 Hidden Settings is an app that allows you to easily and safely change a series of settings that are normally not available to the user.
When it comes to Android customization, savvy users tend to think of custom ROMs such as CyanogenMod or Paranoid Android, but thatís not something that any user can easily do. While flashing a new ROM is the most powerful way to refresh you Android device, there are more accessible ways to make changes.
For Samsung devices, one simple method to change system settings is to manually edit a so called CSC file. To make the process even more straightforward, XDA member nagasgura created an app called Note 2 Hidden Settings, that does all the work for you.
read more here: Disable the shutter sound and change other settings on the Note 2 with this simple app