4.0.2 to 4.0.1 downgrade

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

  1. Gavernty macrumors 6502

    Joined:
    Jun 25, 2010
    #1
    Hey I'm trying to downgrade to 4.0.1 and I keep encountering an error through iTunes... I have backed up my shsh in cydia I changed the host file and downloaded 4.0.1 did the shift click and about 5 seconds in I get an iTunes error "the iPhone (iphone) could not be restored error 2009. Anyone else run into this ??
     
  2. Gavernty thread starter macrumors 6502

    Joined:
    Jun 25, 2010
    #2
    Also after this happens my phone restarts and 4.0.2 is still installed
     
  3. 99MustangGTman macrumors 6502

    Joined:
    Dec 3, 2008
    Location:
    Germantown MD/ Columbus OH
  4. NickkyJ macrumors regular

    Joined:
    Aug 29, 2010
    #5
    you see once i download my firmwire it says it is compressed and zipped. And i just downoaded 7 zip to see if it works. Does anyone else have another program?
     
  5. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #6
    Rename it to .ipsw not zip format.
    If your browser downloads it as zip iTunes won't recognize it.
     
  6. NickkyJ macrumors regular

    Joined:
    Aug 29, 2010
    #7
    So when i click my firmware that i want to download i have to hit save than change the format? and i heard you cant do it on a mac if you havent jailbroken before so im using a pc
     
  7. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #8
    Yes change the drop down from zip to all files and delete the end .zip and type .ipsw
     
  8. NickkyJ macrumors regular

    Joined:
    Aug 29, 2010
    #9
    Sorry im a newb at this and im the person who needs directions sometimes to understand. But let me see if this is what you are saying.
    Download the firmware
    Hit Save
    Change the format to ipsw instead of Zip and everything shall work.
    And do you recommend jailbreakme.com or something else
     
  9. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #10
    No idea.
    You didn't say what phone, firmware version your on etc..
    You just posted on someone elses thread.
    What exactly you want to do again?
     
  10. NickkyJ macrumors regular

    Joined:
    Aug 29, 2010
    #11
    I have a Iphone 3gs it is 4.0.2 software. I want to either downgrade to 4.0.1 and i want to jailbreak it or should i wait tell 4.1?
     
  11. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #12
    You can't downgrade unless you have shshs saved on cydia or locally for built 4.0.1 to downgrade to.
    If not you got no option but to wait.
     
  12. NickkyJ macrumors regular

    Joined:
    Aug 29, 2010
    #13
    i have no problem with waiting. What site will i use tho thats the thing?
     
  13. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #14
    Noone knows yet since not even the official 4.1 is out never mind the jb tools.
    When those are out we will find out.
    Keep an eye on this section and you'll know when the time is right.
     
  14. NickkyJ macrumors regular

    Joined:
    Aug 29, 2010
    #15
    okay thanks and does it matter if i use a differnt program jailbreak me purple rain pwn or whatever? Like will i get a better advantage using one program over another
     
  15. Dan14 macrumors regular

    Joined:
    Aug 28, 2009
    #16
    Just a thought - I'm sure it's been considered before, but I thought I'd ask anyway...

    Do you think there is a way to engineer an SHSH blob for those who don't have one or only have a different version? For example, is there a way to code a new one or edit the code of an existing one for those who forgot to get one for 4.0.1?

    Does anyone actually know how the file is constructed or the variables used? Can they be opened in notepad and customised for another device? Since mine are all on Cydia I've never really had a chance to test this.
     
  16. cobra5mil macrumors member

    Joined:
    Jun 26, 2010
    #17
    LOL. I find it funny how notepad seems to always be the answer to editing special files.

    The SHSH is a heavily encrypted public key, which is then compared to Apple's private key on their end. It would take multiple supercomputers and who knows how long to crack the encryption through brute-force. Don't hold your breath on this ever being cracked.
     
  17. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #18
    Not possible.

    What different program? I give up.
    Educate yourself a little on the topic before asking anything else.
    There's nothing u can use now that will work period.
     
  18. Dan14 macrumors regular

    Joined:
    Aug 28, 2009
    #19
    LMAO, sorry, or your favourite text editing program, although notepad is the most widely recognised but as you wish!

    Alright, I was just asking ;) Was a long shot. Shame there's no way for those perhaps inheriting an iPhone with the latest firmware wishing to jailbreak and being unable to...
     

Share This Page