First: Free download iPhone Contacts Backup software, install and launch it in your computer. The main interface is as following shows:

Second: Connect your iPhone to PC via USB cable. Magic iPhone Contacts Backup tool will automatically detect the device and all playlists will appear in the left panel.

Third: Click "Contact" item, the software will automatically sync iPhone contact in the list. And you can review all the contacts information and check them for backup. Once check over, please hit
on the toolbar. It only takes a few seconds to backup Contacts to PC. So easy and quick, Have a try!

Besides backing up iPhone Contacts, this software is your best helper to manage all your iPhone contents and copy files to PC. PC to iPhone transfer is supported as well!