Hi! The latest Mi 3 phone follows the design of the plastic shell, which is our design philosophy. With the technical support of CNC molding, the plastic shell can effectively play a seamless aesthetic effect, and on the basis of the design of the gold-coated antenna, the plastic shell is more conducive to obtaining excellent network signals. A more detailed description of the problem will help the user understand the problem you are having and help you solve the problem more accurately. Thank you for supporting Xiaomi mobile phone!