Help, milestone SMS contact repeat problem. How to eliminate duplication?

First of all, you don't have to eliminate duplication. . The reason for the duplication is that your card and mobile phone store the same contacts. As long as you click the control key (the one in the four small squares) on the contact page, he will have an option. You only need to choose to read only mobile phone contacts or only SIM card contacts. When you select all contacts, what you say will happen. . If you delete it, it will be unnecessary. I hope I can help you, Sissy.