iTunes could not back up the iPhone because the iPhone disconnected. If you are getting this annoying message while syncing your iPhone ( jailbreaked), follow the methods given below to solve your problem. This problem is occurred while iTunes gets an error while backing up data of your iPhone. Before doing any thing you are advised to manually back up essential data (SMS, Call Records, Notes, Contacts etc.) manually by following this guide Backup iPhone Contacts, SMS, Notes & Call History. This error can be caused by MobileInstallation Patch, previous ...