3.Downgrading to a previous version of iOS is not supported. If you have installed software to perform unauthorized modifications to your iOS device, that software may have redirected connections to the update server (gs.apple.com) within the Hosts file. Uninstall the unauthorized modification software from the computer.
Error 9This error occurs when the device unexpectedly loses its USB connection with iTunes. This can occur if the device is manually disconnected during the restore process. This issue can be resolved by performing USB troubleshooting, using a different USB dock-connector cable, trying another USB port, restoring on another computer, or by eliminating conflicts from third-party security software.
Error 1604This error is often related to USB timing. Try changing USB ports, using a different dock connector to USB cable, and other available USB troubleshooting steps (troubleshooting USB connections). If you are using a dock, bypass it and connect directly to the white Apple USB dock connector cable. If the issue persists on a known-good computer, the device may need service. If the issue is not resolved by USB isolation troubleshooting, and another computer is not available, try these steps to resolve the issue:
Force restart your iOS deviceHold down the Home and Sleep/Wake button until the Apple appears and then release. Once the device has started up or displays a connect to iTunes screen, try to restore again.Restore on a different computerIf the issue is not resolved with the above steps, try to restore using a different computer. Ensure that the computer you use has an active connection to the internet, the latest version of iTunes, other USB devices except the keyboard and mouse have been disconnected, and connect directly to a rear USB 2.0 port on the computer.If another computer is not available, continue with the steps below.
Note: iTunes makes a secure connection over the Internet to the above servers. Since it is a secure connection, it is especially critical that your computer's date and time are correct.To learn how to open your network to access these servers, refer to your router, firewall, or security software documentation. Follow the steps in Troubleshooting security software issues to identify, update, and configure third-party security software to resolve a restore error.You may need to update, properly configure, disable, or uninstall built-in firewalls and other security software to prevent interference with iTunes. For assistance with this, contact the company that supports the firewall or security software you use. If you are using proxy settings, try to restore or update without using a proxy.Use MSConfig to restart your PC using Selective StartupOn a PC, try to restore your iPhone, iPad, or iPod touch after restarting in Selective Startup mode. Do not use MSConfig to resolve restore issues caused by security software. For instructions on how to use MSConfig to restart your PC in Selective Startup with the appropriate Apple software enabled, see the following articles:
Error 1Unable to downgrade. Try changing the USB port (the back one of chassis is better) and restart computer. The installed version of iTunes may also be too old. Update iTunes. Error -1Error occurs when one uses the 'last ditch' method for preventing baseband updates on the iPhone. The baseband does not get updated using this method. Use FixRecovery to kick it out of recovery mode. Error 2Sn0wbreeze 1.6 Custom Firmware has a ASR patch problem. Use sn0wbreeze 1.7 or PwnageTool. Device isn't bootable. Error 6Not enter the downgrading mode, change USB port (the back one of chassis is better) and restart computer. Error 9 Due to asr being patched, the SHA signature is automatically changed and after being resigned the kernel will refuse to use it. Therefore proper kernel patches are required. If necessary kernel patches are not applied, it will fail to load asr and error 9 would occur during restore.Rebooting your PC may resolve this issue. Aslo it can be connection issue.Error 10LLB is missing from the IPSW. The device cannot be booted up. The trick to skip the baseband update no longer works. Error 11Removed bbfw file in the firmware folder of an unzipped IPSW. Error 13Occurs when you want to install a beta firmware with iTunes for Windows (actively blocked by Apple; beta users are developers and therefore must have a Mac). Error 13 may also signify a USB problem. Check the USB connection and try other direct ports or maybe the USB cable is an older one. Device isn't bootable. Error 14Custom firmware update fail (PwnageTool). You have to restore the device with a custom firmware. Update to a custom firmware isn't working. Device isn't bootable. 2 USB Problem. Check the USB connection and try other direct ports or maybe the USB cable is an older one. Device isn't bootable. Error 17Custom firmware update fail (sn0wbreeze). You have to restore the device with a custom firmware. Update to a custom firmware isn't working.Error 18This occurs when the media library on the device is corrupt and cannot be modified or updated. Updating to the latest version of iTunes and then restoring should resolve this issue.Error 20Reportedly happens during failed downgrade attempts, Some have seen success afterwards by doing the downgrade from DFU mode instead of the normal Recovery mode.Here is a list of iTunes errors that could appear when you restore iPhone, iPad and iPod Touch using iTunes. Error when using Sauriks server for a restore with iOS 5.x in the recovery mode at least on a A5 device. This error can also happen when you try to restore an iPod with hardware dfu. Use iREB r5 to solve this. or You are trying to update to a beta firmware without UDID activation. Error 23Baseband Communication error (Hardware), Most probably Baseband chip is faulty.Error 26False version of the NOR flash firmware. Use the correct sn0wbreeze version. Error 27modified the restore.plist so it would flash and also exchanged RestoreRamDisk and kernelcache. restore the original iOS.Error 28The problem is a bad dock connector on the iPhone. Must change the connector. If you have tried almost everything, reset the logic board leave uncharged for 2-3 days or remove battery for an hour. If doesn't work, the flash memory is damage . Error 29You might need to change the battery. Error 31DFU Loop, Sometimes during the restore with your messed-up IPSW, iTunes will return error 31. This is what's referred to as a DFU loop. The only solution is to restore a working firmware.Error 34Hard disk is run out of space when trying to download. Clear space and then continue downloading.Error -35Error when downloading songs purchased on iTunes, See Apple's KB article. Error 37iPod touch 2G LLB patched with the 0x24000 Segment Overflow was used on an iPhone 3GS custom firmware. Known on damaged bundles from unofficial PwnageTool distributions or bundles. Error 40Hacktivation bug in Sn0wbreeze, Use update one..Error -50Delete Storm Vedio, QuickTime, iTunes, then reinstall iTunes. See also Apple's KB article.
Error 1002Are you restoring to a stock apple firmware or a custom pwn firmware? Either way make sure you are in DFU mode first.Error 1004This is caused by a failure to match the Baseband Nonce currently in memory to the Nonce returned in the BasebandFirmware SHSH blob. This is a normal part of iPhone 4 local restores via TinyUmbrella.Error 1011The file iTunesMobileDevice.dll is damaged or updated. Error 1013Restart computer; change computer; reinstall system, if iPhone is always in restoring mode: XP users can jump from restoring mode with ibus; MAC users can use iNdependence. (usually on the iPhone with 1.0.2 firmware downgraded from 1.1.1) Error 1014This error is down to itunes not liking your USB ports on your computer. Use a different USB slot or a different computer if possible. That is the easiest fix!Error 1015Restart computer; change computer; reinstall system, if iPhone is always in restoring mode: XP users can jump from restoring mode with ibus; MAC users can use iNdependence. (usually on the iPhone with 1.1.1 firmware downgraded from 1.1.2) Baseband firmware on the IPSW is higher than the baseband firmware on the iPad/iPhone.Error 1050Bad response from gs.apple.com OR need iREB for preparing the device for restoring to custom IPSW Error 1394When Spirit2Pwn flashes parts of the boot chain on iOS 4, the device may crash into DFU Mode.Error 1413Restart computer; change USB port; reinstall system. See also Apple's KB article. Error 1415Restart computer; change USB port; reinstall system. Error 1417Restart computer; change USB port; reinstall system. Error 1418Restart computer; change USB port; reinstall system. Error 1428Restart computer; change USB port; reinstall system. Error 1600Custom firmware can't be restored on a device with DFU Mode. Use Recovery Mode. Error 1601Completely remove iTunes and Apple Mobile Device support and then reinstall iTunes Error 1602Restart computer; change computer; reinstall system. Error 1603False kernelcache patch. Known on damaged bundles from unofficial PwnageTool distributions or bundles. See also Apple KB articleError 1604Device was not pwned (signature checks were not blocked). Custom firmware can't be restored. Error 1611iTunes tried to enter the Restore Mode, but the device turned back to the Recovery Mode. Error 1618Missing system files or corrupt data in iTunes installation. Try to uninstall iTunes, restart computer, install again. This error also occurs for iTunes in Windows 8 for reasons currently unknown. Error 1619 iTunes is too old and couldn't read the iPhone in Recovery or DFU Mode. Please update iTunes and try it again. Error 1644IPSW was moved during prepare with iTunes. Try it again and don't move the IPSW. Error 1646iTunes expected the device to be in a different state (Example: booted into iOS rather than jumping to iBEC). Error 2001The Mac OS X kernel extension 'IOUSBFamily' that was bundled with late 2008 / early 2009 MacBooks, has a bug where it fails to properly recognize an iDevice in DFU Mode. It can be resolved by updating to 10.5.7 (or later), or using a USB hub. Error 2002iTunes can't connect because another program is using it or it's disconnected during the Apple Server check. Error 2003Connection problem; change USB cable and check USB port. Error 2005Problem connecting. Probably a hardware failure. Somebody reported that reinstalling the USB drivers fixed the problem. Error 2006Replace the USB cable with a newer one and/or disconnect all other USB devices, then retry.Error 2009remove all USB devices and spare cables other than your keyboard, mouse, and the device, restart the computer, and try to restore.Error 3XXXiTunes can't connect to gs.apple.com. Maybe Port 80 and Port 443 is blocked. Open it on your router. Error 3002Update to an older firmware isn't working, because Apple is no longer handing out SHSHs for the device/firmware combination. Error 3004No internet connection during the firmware restore. Error 3014False edited hosts. The SHSH request couldn't be completed. No connection to the Apple Server, Sauriks Server or localhost. Error 3123Something dealing with movie rentals. Error 3194Right-click on QuickTimePlayer.exe choose Properties from the shortcut menu click on the Compatibility tab. Deselect the checkbox labeled Run this program in compatibility mode for..Error 3194Occurs when trying to install an old firmware and Apple's server disallows the installation. The only solution is to have SHSH backup and modify the hosts file to point to Saurik's Cydia server where they are backed up (or localhost if you have it yourself). Error 3195'An internal error occurred.' Missing SHSH for the firmware. Maybe the same as 'This device isn't eligible for the request build.' but with an cache error. Error -3198Error downloading, try again. or This device isn't eligible for the requested build.Error 3200 You are trying to update to iOS 5, when infact, the IPSW file has only a Restore Ramdisk. Error -3259Connection timeout, try again. Error -5000There is a problem with the permissions of the Mobile Application folder. The App you've tried to download in iTunes couldn't be saved. Error 9008Error downloading, try again.Errors 9800Set exact date, restart computer. See also Apple's KB article. Error 9808Computer system time incorrect. Error 9812Check system time, reset Internet connection, update root certificates.Errors 9814 Set exact date, restart computer. See also Apple's KB article. Errors 9815Set exact date, restart computer. See also Apple's KB article. Error 9843This error happens if you are logged out, try to download something from the iTunes store and if you click on 'Download' and enter an account, which doesn't have this article, this error will occur. Error 11222internet options Connections tab Click LAN Settings uncheck 'use a proxy server'Error 11556You're trying to access a section or a functionality that is not available in your country, for example iCloud in some countries. Error 13019Seems to be an issue with syncing media to the device.It only seems to happen on jailbroken devices. Create new user, try syncing with new user's library.Need restore the device....Error 20000Is caused by a custom theme pack on your Windows. Use default Theme.Error 20008 This happened on a Mac with TinyUmbrella running before restoring a firmware to the Apple TV.0xE8000001Device was suddenly unplugged. iTunes couldn't connect with the device. Try it again.0xE8000022Error in your firmware files. Restore.0xE8008001IPA signature verification failed. 0xE800003DFalse permissions in the Carrier Bundle folder. Restore, update or fix the permissions from the carrier bundle to update the carrier settings via iTunes. 0xE800006BDevice was suddenly unplugged. iTunes couldn't connect with the device. Try it again. 0xE8000065sn0wbreeze custom cirmware error on USB connection. Unplug the device, reboot it, and plug it in again. 2b1af7f3a8