Restoring custom IPSW made with PwnageTool or Sn0wbreeze without pwning the iBoot in your iDevice results in Error 1600. If you will try to restore using recovery mode, iTunes will throw Error 21 and if you will try to restore custom IPSW using normal DFU mode, you will get Error 1600. To fix this error, you must put your iDevice into Pwned DFU Mode using iREB.
Fix iTunes Error 1600, 1601, 1603 & 1604 With iREB :
- Download iREB for Windows from here
- Connect your iDevice to your PC via USB cable.
- Close iTunes window if already opened.
- Launch iREB and click on the name of your iDevice.
- Now use the following instructions to put your iDevice into DFU mode:
- Hold down the Home+Power button simultaneously for 10 seconds.
- After 10 seconds, release the Power button but keep holding the Home button until iREB detects your iDevice in DFU mode.
- As soon as iREB will detect your iDevice in DFU mode, it will patch the iBoot using Limera1n exploit.
- Once patched, iREB will confirm you that your iDevice has been put into Pwned DFU Mode.
Fix iTunes Error 1600 Using Redsn0w:
- Launch Redsn0w and click on the Browse button. Choose stock IPSW ( not custom firmware) and wait while Redsn0w process the provided IPSW.
- Uncheck all other jailbreak options except Just enter pwned DFU mode right now
- Plug your iDevice to your PC or Mac and turn it OFF completely by pressing the Power button.
- Now put your iDevice into DFU mode using the following instructions:
- Hold down the Power (corner) button for 3 seconds.
- Without releasing the Power button, also hold down the Home (bottom center) button for 10 seconds.
- Without releasing the Home button, release the Power button BUT KEEP holding the Home button for 15 seconds until Redsn0w detects your iDevice in DFU mode.
- Now Redsn0w will patch the iBoot of your iDevice using Geohot's Limrea1n exploit.
- Once done, click on the Finish button to close Redsn0w. Launch iTunes, hold down the ALT (Option) key and click on the Restore button. Hopefully you will not get any 16xx error including 1600, 1601, 1603 & 1604 during the restore process.
