Method for deleting address book:

1, iphone6 with pc.

Step 2 open iTunes

3. Top: In the "Summary"/"Information"/"Application"/"Ringtone" column ..., click in the "Information" column.

4. After clicking the "Information" column, in the option bar in front of "Synchronize Address Book with outlook", you will generally put a "small tick" and click "Cancel".

5. The system pops up a dialog box, prompting iTunes not to synchronize the address book to the iphone. Do you want iTunes to delete the address book that was previously synced to iphone?

6. There are two option buttons at the bottom of the dialog box: "Delete Address Book" and "Do not delete Address Book".

7. Click the Delete Address Book button.

8. At this time, in the option bar in front of "Synchronize Address Book with outlook", the "small check" is not checked.

9. Click the "Apply" button in the lower right corner again.

10, and finally click the "Sync" button.