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well,i have encountered this problem , i solve it by iphone transfer .and i share u all the page here "how to transfer iphone contact to PC."connect your iphone with computer and open itunes, when itunes recognize your iphone, open the info tab and select to sync address book contacts, then click “apply”. If this is your first using iphone I suggest you go to apple’s support website to learn more basic uses, if you tired of itunes you can choose other iphone transfer to do your backup.