Possible to downgrade to custom firmware?

Discussion in 'Jailbreaks and iOS Hacks' started by docaholic, Apr 16, 2011.

  1. docaholic macrumors newbie

    Joined:
    Apr 15, 2011
    #1
    Hey guys, I have the SHSH blobs for 4.2.1 and 4.3.1.

    I'm currently on 4.3.2. Is it possible to downgrade to 4.3.1 custom firmware from 4.3.2?

    I'd like to know if this is possible so I don't have to restore custom firmware after downgrading.

    Thanks.
     
  2. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #2
    Yes, as long as you got blobs for 4.3.1 you can create a custom JB ipsw and restore to it.
    Either run TU TSS server or have your hosts edited to point to cydias server for the check.
     
  3. docaholic thread starter macrumors newbie

    Joined:
    Apr 15, 2011
    #3
    Thanks, I'll give this a shot. *fingers crossed*
     
  4. docaholic thread starter macrumors newbie

    Joined:
    Apr 15, 2011
    #4
    Okay so I tried it...

    Needless to say it didn't work...I actually ran into a bunch of problems.

    I used the TSS server in tinyumbrella. That worked like a charm, I was able to downgrade to the custom firmware after entering DFU.

    Problem: I can't exit out of DFU after install. I used tinyumbrella's "Fix Recovery" thing, but all that does is kick it to a white screen which does nothing.

    So then I tried to restore to a stock 4.3.1. That didn't work either. Gave me a 1013 error.

    So then I just tried a straight up restore. That worked, restored my phone to 4.3.2.

    Any pointers on what went wrong?

    Thanks guys.
     
  5. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #5
    You need to put it in pwned dfu mode to restore to custom firmware. Not just regural dfu or it won't work.
     
  6. docaholic thread starter macrumors newbie

    Joined:
    Apr 15, 2011
    #6
    Oh sorry Applejuiced, I forgot to mention I used snowbreeze to enter the pwned DFU state and that's what lead me to my first scenario =\
     
  7. Shivek macrumors member

    Joined:
    Oct 14, 2010
    #7
    Downgrade to 4.2.1 and use GP to kick you out of recovery mode. Downside of downgrading: call failed appears right after a person hangs up.
     
  8. docaholic thread starter macrumors newbie

    Joined:
    Apr 15, 2011
    #8
    Hmm...I can't downgrade to 4.2.1, I have the 4.10.01 baseband (courtesy of 4.3.1).

    I've tried it again, still didn't work; stuck at DFU.

    I guess it's back to 4.3.2 and waiting for an untethered for me =(.
     
  9. Shivek macrumors member

    Joined:
    Oct 14, 2010
    #9
    Yes, you can. Use GP to kick out of DFU/Recovery mode.

    And before you try to restore to 4.2.1, add this to your hosts file:

    74.208.105.171 gs.apple.com
     
  10. docaholic thread starter macrumors newbie

    Joined:
    Apr 15, 2011
    #10
    Did you have to go into pwned DFU mode to downgrade to 4.2.1 or is a regular downgrade good enough?
     

Share This Page