Problem Restoring iOS After Jailbreaking iPhone 4S
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paulocunha • January 29, 2013 at 5:56pm
I have an iPhone 4S running jailbroken iOS 5.0.1 and I am trying to upgrade to iOS 6.1.1, but I am running into issues. I do not have the SHSH blobs for my device. I have tried using RedSn0w and changing the iTunes host server, which resulted in errors 3194, 21, and 1600. How can I successfully restore or update my firmware?
Answers
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iClarified • January 12, 2026 at 5:04am
To restore or update a jailbroken iPhone 4S, you should use DFU mode. Errors like 3194, 21, and 1600 often happen when iTunes cannot verify the firmware with Apple servers. This is frequently caused by entries in your computer hosts file that redirect gs.apple.com to Cydia servers. 1. Open your hosts file and remove any lines containing gs.apple.com. 2. Put your iPhone into DFU mode by connecting it to your computer, holding the Power and Home buttons for 10 seconds, then releasing Power while holding Home for another 10 seconds. 3. Use iTunes to restore the device to the latest signed firmware. Note that you can only restore to firmware versions currently being signed by Apple unless you have saved SHSH blobs.
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Thatcher • January 30, 2013 at 9:11am
If you are updating to a firmware version that is still being signed by Apple, you do not need SHSH blobs. The errors you are seeing, such as 3194, often indicate that your computer hosts file is redirecting Apple signature servers to another location. You should check your hosts file and remove any lines containing gs.apple.com. Once that is done, put your iPhone into DFU mode and use iTunes to perform a clean restore.