Android -新的数据记录被添加到错误的联系人。

I'm trying to add Data record to an already exist contact, I find the contact using phone lookup, i take the contact _id field, and add a new data with raw_contact_id set to the _id field. on some contacts it just doesn't work, it match the data to different contact. (I think it relates to contacts that are stored on the sim card)I'm trying to add Data record to an already exi