Customized version refers to a model in which the operator requires the mobile phone manufacturer to make minor changes to a certain model of mobile phone (such as screen material, LOGO, etc.) and add some software programs specified by the operator. Generally, this type of model The phone will have operator logos (China Unicom wo, China Mobile G3, etc.) in obvious places (such as the top of the screen, the middle or bottom of the back), but generally there will be manufacturer marks, but in less obvious places