3G Downgrade from 4.0.2 to 4.0.1 WITHOUT SHSH:

Discussion in 'Jailbreaks and iOS Hacks' started by note235, Aug 29, 2010.

  1. note235 macrumors 6502a

    Joined:
    Jun 29, 2007
    #1
    So someone paid me to unlock their iphone but theirs was on 4.0.2 and i looked around trying to see if i could downgrade without a shsh file saved locally or on sauriks server, and stumbled upon dough boy's thread. The first video he posted DID NOT WORK but i changed something to see if it might and a member said SHSH does not need to be saved and someone said it does so i dont know which is which but anyways here's the directions

    1.
    download tinyumbrella-latest version
    itunes latest version
    iphone 3g on 4.0.2
    go to felix and download 4.0.1
    enter the iphone into dfu mode
    edit your host file so it looks like the one below--i used wordpad with admin mode on windows 7
    i deleted
    # 127.0.0.1 gs.apple.com and
    gs.apple.com so i only had this


    ##Hosts file edit

    127.0.0.1

    #74.208.105.171 gs.apple.com


    i dont know if this is needed but i saved the 4.0.2 shsh
    and ran the tinyumbrella server on admin mode
    that is my exact host file that i am using to do this
    shift click restore on and point to 4.0.1 and bam
    it works
    ill post up pics and some videos if ppl want the videos, they're long though and i mumble haha
    but for tinyumbrella i do have 4.0.1 and 4.0.1 saved for MY iphone4 along with the 4.0.2 saved for the iphone 3g
    it might work for a 3gs but i don't have one so i can't test it out

    [​IMG][/url]

    [​IMG][/url]


    [​IMG][/url]
     
  2. thespazz macrumors 6502a

    Joined:
    Jul 5, 2007
  3. Myzhi macrumors 6502a

    Joined:
    Dec 15, 2009
    #3
    If you did more research you would realize 2G & 3G phones don't need to worry about SHSH hashes to downgrade. That security check was started with the 3GS, added to IPhone 4, probably next iPhone and so on.
     
  4. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #4
    That is false.
    They started adding shsh to 3G iPhones after 4.0 came out.
     
  5. note235 thread starter macrumors 6502a

    Joined:
    Jun 29, 2007
    #5
    oh yeah i heard about that
    so idk, this works and someone might find it useful haha
     
  6. dhlizard macrumors G4

    dhlizard

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    Mar 16, 2009
    Location:
    The Jailbreak Community
    #6
    Yes, but it's a soft check and can easily be defeated.
    Unlike 3GS and iPhone 4 authentication.
     
  7. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #7
    I heard that before but not how it can be defeated.
    And if that's the case then why is Cydia saving shsh for iPhone 3G if it can be easily bypassed?
     
  8. Myzhi macrumors 6502a

    Joined:
    Dec 15, 2009
    #8
    Probably, just in case Apple comes out with better software security check. Good idea to be proactive. Better be safe than sorry.
     
  9. spencers macrumors 68020

    spencers

    Joined:
    Sep 20, 2004
    #9
    Lol, at OP. Good job posting your hosts file that clearly shows you pirate adobe apps.
     
  10. Applejuiced macrumors Westmere

    Applejuiced

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    At the iPhone hacks section.
    #10
    I hear you but nobody is showing me how to do it incase I need it in the future:)
     
  11. dhlizard macrumors G4

    dhlizard

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    Mar 16, 2009
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    The Jailbreak Community
    #11
    Remember AJ, look at the boatload of jailbreakers who can't even manage to navigate their phones to jailbreak.me website which only requires a single swipe to jailbreak.

    Whoa ! :eek: Anything requiring more than 2 steps, they are so lost !

    So, Saurik has those covered by instituting the saving of 3G hashes for firmware 4.x.x
     
  12. Applejuiced macrumors Westmere

    Applejuiced

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    #12
    No doubt about that.
    Some questions here lately amaze me:)
     
  13. Myzhi macrumors 6502a

    Joined:
    Dec 15, 2009
    #13
    Sure, Dev Team would post something if it changes, but right now, it's seems pretty straight forward using Redsn0w to 4.0.2 on 2G & 3G.
     
  14. mrblack927 macrumors 6502a

    mrblack927

    Joined:
    Aug 19, 2008
    #14
    Gee, what are all those adobe entries in your hosts file.... :rolleyes:

    Classy.
     
  15. nobias macrumors regular

    Joined:
    Jun 23, 2010
    #15
    My thoughts exactly. Looks like his "friend" (cough) is pirating some
    Adobe products.
     
  16. note235 thread starter macrumors 6502a

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    Jun 29, 2007
  17. dhlizard macrumors G4

    dhlizard

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    Mar 16, 2009
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    The Jailbreak Community
    #17
    haha updated ?

    Is this kid even 13 ? :rolleyes:
     
  18. note235 thread starter macrumors 6502a

    Joined:
    Jun 29, 2007
    #18
    i meant I changed the original post and removed the adobe files, though idk how it'd really matter
     
  19. Applejuiced macrumors Westmere

    Applejuiced

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    At the iPhone hacks section.
    #19
    Yes bu redsnow doesn't install or restore the firmware. It just jailbreaks it once it's already on the firmware.
     
  20. NickkyJ macrumors regular

    Joined:
    Aug 29, 2010
    #20
    So Jailbreaking on a 3g using redsnow is the only way on 4.0.2?
     
  21. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #21
    Yes.
     
  22. hackthatphone macrumors 68000

    hackthatphone

    Joined:
    Jul 28, 2010
    #22
    I'm sure this is just to be annoying on Apple's part and to stop the dumbest of the jailbreakers out there. Guess they are hoping to shrink the pool a little bit.
     

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