Samsumg S9 Misty Purple to Gradient Back Cover

Quick answer：

The Samsung S9 was released with a Misty Purple color option. Some users opt to replace the original cover with a gradient back cover, which can change the appearance of the phone. Gradient covers are designed to give the illusion of a smooth transition of color, enhancing the visual appeal of the device. However, replacing the original cover may affect the phone's warranty and water resistance if not done by an authorized service provider.