A client of mine got a new iPhone 6 and he's getting an error when tethers his iPhone to iTunes on his Windows 7 PC using a Lightning/USB cable. I'll fix the error to enable him to push music to the phone, but he claims he needs to tie the iPhone into iTunes to fully backup the phone. The phone is linked to his iCloud account. I verified this. With this iCloud link, is there any need to connect the phone to iTunes for backup reasons?