How to turn off Camera shutter sound in Samsung phones

Do you know that there are many countries in the world that do not allow phone maker to turn off camera sound because of regulatory norms .This is the major reason that so many smart phone makers do not allow camera shutter sound to be turned off  when phone is in 'Sound' mode.

There are several ways we can turn off camera sound in smart phone if
there is no facility to turn off :

1.Keep your smart phone into Silent mode and take photo
2.Keep your phone into vibrate mode and take photo or video.
3.One Can install Android app from Play Store for Silent Camera.