Restore (remove jailbreak) without updating error 1604

[KrazeeMonkee]

Hi guys, I followed the instructions in this guide (http://www.iphoneforums.net/forum/iphone-jailbreaking-17/restore-without-updating-35659/) in order to remove the jailbreak off of my 5.0.1 iPhone 4. When it came time to save the SHSH blobs using Tiny Umbrella, it didn't save any 5.0.1 blobs; rather, the earliest firmware blob it saved was 5.1. So, I went ahead and split that blob with the 5.1 firmware using redsn0w. I then followed the instructions to enter the "pwned DFU mode" so that I can restore my phone through iTunes, and when it got to the part where it authorizes the firmware, it stops and gives me an error message that reads: "The iPhone "iPhone" could not be restored. An unknown error occured (1604)."

Any help at all would be greatly appreciated!

Thanks in advance.

 

[willerz2]

If you're going to use Pwned DFU mode with iTunes, you'll most likely need TU's TSS server.

Just use RedSn0w's restore feature. RedSn0w > Extras > Even More > Restore. Select IPSW and point it to the iOS 5.1 IPSW. Then for blobs, select remote and it'll stitch and upgrade. Once your restore is done, you'll need to use a Recovery Fix on it to get it out of Recovery Mode. 1 time go, no iTunes required.

 

[KrazeeMonkee]

It's not letting me get out of recovery mode though. I can't turn the phone off or restart it. Since I'm not actually restoring to a previous firmware, but instead going from 5.0.1 to 5.1, can I just choose to restore to the 5.1 firmware file without the blob?

 

[willerz2]

Can I Downgrade/Re-restore my iPhone from iOS X to iOS Y

 

[KrazeeMonkee]

Oh, so that says that blobs are still manditory. But, my phone can't get out of recovery mode and I don't know what are my choices. Why do I keep getting that error and how can I fix it and restore using the blob+firmware that I have?

Thanks again helping..

 

[willerz2]

Plug your device into your PC, put it into DFU mode. Go to RedSn0w > Extras > Even More > Select IPSW > Choose the iOS 5.1 IPSW that matches your 4's model > Remote. It'll stitch the IPSW and restore at the same time. Since you're in DFU mode already it'll go ahead and put your device into Pwned DFU and continue to restore.