Samsung
Turn Off Camera Shutter Sound auf Samsung
On newer Samsung phones the camera shutter click is tied to the general media volume, not to a separate camera setting. Samsung removed the dedicated shutter-sound switch from the Camera app years ago, so you cannot toggle it from inside the app anymore.
To silence the sound you have to lower the system media volume instead. Open Settings ➔ Sounds and vibration ➔ Volume, then move the slider all the way to the left. This sets the media stream to zero, which also mutes the shutter click.
This slider controls every media playback source, including videos, games and music through the speaker. If you want to keep other media audible but still mute the camera, you need to lower the slider right before shooting and raise it again afterward.
In some regions with mandatory camera-sound regulations, mainly parts of Asia, Samsung disables this option completely and the shutter sound cannot be turned off through any setting.