Why is there a color difference between the SIM card tray and the middle frame on the REDMI Note 14 Pro+ 5G?

The SIM card tray is treated with a matte spray finish, which involves applying a coating that results in a non-reflective and smooth texture.
The middle frame of the phone undergoes a more complex finishing process involving a glossy spray finish followed by laser engraving. Laser engraving allows for extremely fine details and clear markings, giving the phone a clean and modern aesthetic.
There's no need to worry about the color difference, as it's simply a result of different processes and does not affect the performance of the device. Please feel free to use it.