how to downgrade from 5.1 without shsh blobs on a 3gs

Discussion in 'Jailbreaks and iOS Hacks' started by babybuuutch, Mar 13, 2012.

  1. babybuuutch macrumors member

    Joined:
    Jan 16, 2012
    #1
    I'm trying to get back to 5.0.1 so I can get my iphone to work. I'm on a 3gs and upgraded to 5.1 but I get a no service problem after my jailbreak because I'm on the new bootroom. I'm thinking the only way to fix this is to downgrade to 5.0.1 and fix it that way.
     
  2. TriJetHero macrumors 601

    TriJetHero

    Joined:
    Oct 13, 2010
    Location:
    World
  3. babybuuutch thread starter macrumors member

    Joined:
    Jan 16, 2012
    #3
    6.15
     
  4. ylerT macrumors regular

    ylerT

    Joined:
    Jun 10, 2011
    Location:
    Las Vegas
    #4
    Did you make sure you ran a "tethered boot" after doing the jailbreak and unlock?

    As far as downgrading, with no blobs, you will not be able to get back to 5.0.1. Apple has been signing 4.1 for the 3Gs for quite some time and as far as I know, they still are. It's an older firmware version, but unfortunately, that may be your only option right now.
     
  5. TriJetHero macrumors 601

    TriJetHero

    Joined:
    Oct 13, 2010
    Location:
    World
    #5
    In redsn0w make a custom NO_BB IPSW via Extra's/Custom IPSW


    With that custom IPSW stitch your blobs/APticket combi to a new custom IPSW

    redsn0w Extra's/SHSH/Stitch

    With that second custom IPSW in iTunes do ALT-restore to restore
     
  6. babybuuutch thread starter macrumors member

    Joined:
    Jan 16, 2012
    #6
    on tiny umbrella it sats I have shsh for 5.0.1 but I can't use ifaith to downgrade because I'm on a mac. How can I get the 4.1 firemware?
     
  7. saud0488 macrumors 6502

    Joined:
    Aug 18, 2011
    #7
    http://www.felixbruns.de/iPod/firmware/

    Use pwnagetool to make custom firmware though. Then alt restore to that firmware in DFU mode. A lot easier this way.
     
  8. dhlizard macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
    #8
    If you want to restore to 5.0.1, you will need both 5.0.1 hashes and APTicket
    Use Redsn0w to stitch both to a No_BB IPSW
    Put your 3GS in DFU mode and use iTunes (shift+restore) to restore it
    Host file must be pointing at Cydia

    4.1 is still signed by Apple, so if that is your choice, download the 4.1 IPSW, DFU and shift+restore in iTunes
    For this, host file must point at Apple
     
  9. babybuuutch thread starter macrumors member

    Joined:
    Jan 16, 2012
    #9
    Since I'm on a new 3gs bootroom i have to shsh my blobs with the custom fireware and I'm not sure how to do that.
     
  10. dhlizard macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
    #10
    You have 2 threads going, chech the other one
     
  11. babybuuutch thread starter macrumors member

    Joined:
    Jan 16, 2012
    #11
    I keep getting the 1600 error which is the one that I didn't go into dfu mode properly but I'm 100% sure I did using red snow.
     
  12. dhlizard macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
    #12
    When you restore, you loose the jailbreak
    Just run Redsn0w to jailbreak
     
  13. babybuuutch, Mar 13, 2012
    Last edited: Mar 13, 2012

    babybuuutch thread starter macrumors member

    Joined:
    Jan 16, 2012
    #13
    thank you thank you thank you. I got it to restore
     
  14. babybuuutch thread starter macrumors member

    Joined:
    Jan 16, 2012
    #14
    My problem now is I get the no signal/service and ultrasnow won't work. When I jailbroke I only checked to download cydia should I have checked the other options? I'm on the new bootrom of a 3gs.
     
  15. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #15
    You might have to reflash the iPad bb using redsnow.
    Just select install iPad bb and uncheck everything else. Then you might need to remove and reinstall ultrasnow.
     
  16. oBMTo macrumors 6502

    Joined:
    Oct 12, 2010
    #16
    What is the latest non-5.1 version still signed by Apple?
     
  17. kdash macrumors newbie

    Joined:
    Mar 18, 2012
    #17
    Solution

    While Jailbreaking your 3GS on ios 5.1, just select two option in redsn0w.

    Install Cydia
    Ipad Baseband

    After making it tethered jailbroken. Install ultrasn0w from cydia, respring your device. Then open cydia again and add this new repo;

    http://repo.iparelhos.com

    After adding it, go to manage>sources>iparelhos.com and install the app ultras 0w fixer for ios 5.1
    After installing respring your ios device.
    Oh! You still getting the no service. Damn Man. ;)
    Just reinstall the ultrasn0w and you are back to life. Cheers
     

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