Resolved Downgrading iPhone 4 to 5.1.1


macrumors 6502
Original poster
Jul 14, 2008
My phone is running iOS 6, but I want to go back to 5.1.1. I have the blobs for 5.1.1 (but just those, no other 5.x blobs), so I think I have everything I need. What I did:

1. Downloaded the 5.1.1 software for my device (iPhone 4 GSM, build 9B208)
2. Downloaded redsn0w to stitch in the blobs
3. Used redsn0w to put my device in pwned DFU mode
4. Option + restore and selected the custom IPSW created in step 2

It goes pretty far, but in the end I'll always the 1604 or -1 errors. I have verified that my hosts file does not have the line in there (that is, it's there but commented out).

Am I missing a step? What can I do to go back to 5.1.1? Thanks!

EDIT: Resolved, I used the fix recovery option from redsn0w, after which my phone rebooted, did some verbose stuff and now it's running iOS 5.1.1 :)
Last edited:


macrumors 68000
Nov 11, 2010
Carnegie and Ontario
Just use Redsn0w or TinyUmbrella to kick it out of recovery, it will then reboot.
This worked, however now I am having a problem activating FaceTime and iMessage. It keeps trying but fails. Also, when I try and install i m z d l's proxy server it says iPhone not activated.