The N920L, K, and F have NO POSSIBLE way to mute the camera. That's a law here in Korea. Even iPhones have no way to mute the shutter sound. You could download a 3rd party app like silent camera or good camera but that's a crapshoot. Some will mute it but most won't. Also you'll take a giant hit in quality. Google camera even has no way to mute it. Embrace that lovely sound! I live in Korea and its always been one of the most annoying things. In fact I sold my iPhone 6 plus for way more then even a new one because it came from America and you could mute the shutter.