Support Backup contact list from different account

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http://androidforums.com – Hi guys, I am new here so please point me out if I said something wrong:) My note 2 suddenly won't charge! So before returning it to samsung customers service center for repair, I would like to backup my note 2 contact list. Unfortunately I have accidentally created many contacts using CardDAV account since I used iPhone before and take advantage of CardDAV to transfer all the contacts from iPhone to Note 2. However, now I have Google account, I would like to sync all of my contacts including Tango, CardDAV, Samsung and etc to my Google account. Is it possible? Many thanks! (General)