ITunes Error 4 issue was raised frequently in 2008 and people guessed that Apple didn't give the solutions because it wanted to prompt the 2.0 update software. Disable any conflicting software including security software.Unplug the extra USB device to make sure only your iPhone/iPad is connected.Restore your iPhone without a SIM card.Clear the iPhone Cookies, Caches, and History from your browser including Safari Bookmarks and passcodes.Do a Factory Reset of your iPhone: Settings > General > Reset All Settings > Erase iPhone.Reboot the computer and iDevice first and then put iDevice into DFU mode.It is similar to iTunes error 1 but the causes are various from OS errors to a hardware issue. An unknown error occurred (3)' when trying to restore iPhone after the iOS update. Often the case that iTunes shows 'iTunes can't continue, error 3' when updating iPhone/iPad or 'The iPhone 'XX' could not be restored. These troubleshooting processes are kinda complicated and time-consuming, so you can try to backup iPhone without iTunes if you just need iTunes to save your iPhone data. Disable any conflicting software like uninstalling security software.Clean out your system junk with disk cleanup.Uninstall iTunes to remove the previous installation files and then reinstall iTunes of the latest version.Install the latest Microsoft Windows updates.Logged into your computer as an administrator: Control Panel > User Accounts > Change account type.iTunes-related files were mistakenly deleted.Virus infection corrupts Windows system files or iTunes-related software files.Interrupted download or incomplete installation of iTunes software.The failure of iTunes installation could also attribute to: And it is commonly related to Apple Application Support failing to install while installing iTunes. 'iTunes error 2', 'Windows error 2' or 'Apple Application Support was not found' happens when fail to update or install iTunes on a Windows. Put the iPhone into the freezer and cool it down.Make sure your computer OS is up-to-date.Remove the SIM card and try to restore it.Put your iPhone in DFU Mode and restore it via iTunes.Check to ensure that your USB cable, computer, and network are reliable.Check the third-party security software that may prevent iTunes from connecting Apple servers or devices.

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And it is generally a hardware issue caused by jailbreaking or dry solder joints because of heating up that makes baseband can't connect to the CPU. ITunes error (-1) often happens with an error message 'iPhone could not be restored unknown error 1.' When restoring iOS iPhone. So, this guide will explain iTunes error codes one by one plus a solution for you to solve your problem.įor mobile users, click here > iTunes Error Code 1 However, the reason causing iTunes errors varies largely each time you plug your iOS device into iTunes. To sum up, iTunes errors from Apple Support mainly refer to server errors, security software, and USB connection. As for the 2, 4, 6, or 1611 errors, they could be caused by security software.

There are some brief introductions to iTunes error codes and simple solutions to such iTunes errors.

ITunes error code numbers vary from cause and this guide covers all kinds of iTunes errors you may encounter when connecting iOS iPhone iPad to iTunes to manage, restore, update, or sync data files, plus solutions to fix iTunes error codes as well.

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