Restore Errors/16xx

Error 1600

 * Custom firmware can't be restored on a device with DFU Mode. The software of the device isn't patched. Using a jailbreak tool, enter a pwned DFU Mode. During that process the software gets patched and the custom firmware should run without any problems.
 * APTicket problems if you try to restore to iOS 5.x in the DFU Mode.
 * If trully stuck (even with an regular iTunes Restore), edit the hosts file and comment out the "guzzoni.apple.com" line

Error 1601
See also Apple's Knowledge Base article number TA38633.

Error 1602

 * Restart computer; change computer; reinstall system.
 * If this error occured during an Apple TV restore, then unplug the Apple TV from the power cable, after you entered the recovery or DFU mode, and then try it again.

Error 1603
False kernelcache patch. Known on damaged bundles from unofficial PwnageTool distributions or bundles. See also Apple's Knowledge Base article number TA38604

Error 1604
Device was not pwned (signature checks were not blocked). Custom firmware can't be restored. Can also happen when there's a problem with the IPSW.

Error 1611
iTunes tried to enter the Restore Mode, but the device turned back to the Recovery Mode. This can happen when updating an iPad 2 jailbroken with Saffron gets updated to iOS5. In this case simply retry, as it is in Recovery Mode then anyway.

Error 1618
Missing 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 1644
IPSW was moved during prepare with iTunes. Try it again and don't move the IPSW.

Error 1646
iTunes expected the device to be in a different state (Example: booted into iOS rather than jumping to iBEC).