What is the cause of Noise while Shaking the Galaxy S8|S8+?

The sound is due to the Camera Lens Barrel required to operate the Auto Focus function. Galaxy S8 supports the Auto Focus feature required for high quality and high resolution of the camera. The 12 MP Camera module “Lens Unit”, Image Sensor, and Auto Focus feature adjusts focus by moving the Lens Units up and down over the Image Sensor. This enables Auto Focus speed and accuracy and helps in reducing battery usage. However, Camera module is fitted with a “Stopper” part to limit lens unit movement within the space for the Camera module.

When the Lens and Stopper touch, when shaking the Galaxy S8|S8+, a minute noise may occur – however, this is normal due to the operation of the Auto Focus feature of the camera. The sound made may differ slightly by device types and model.