For mobile phone, it is a streamlined product, which is not suitable for customization. It needs integrated molding. Manufacturers can only make product output according to different configurations and different memory sizes according to the market purchase judgment. If there is a purchase demand, they will buy finished products according to their own needs, because he needs an assembly line to complete assembly, and the cost of real personal assembly is too high! At most, laser lettering can be used to customize colors, and the cost will be too high if you re-mold.