Upgrade Blackra1n 3.1.2 to iOS4?

Discussion in 'Jailbreaks and iOS Hacks' started by Genghis Khan, Jul 14, 2010.

  1. Genghis Khan macrumors 65816

    Genghis Khan

    Joined:
    Jun 3, 2007
    Location:
    Melbourne, Australia
    #1
    Hi guys,

    I have an iPhone 3GS which I jailbroke to 3.1.2 using Blakra1n. I've been looking for a way to upgrade to iOS4 without losing my Cydia apps.

    Is this possible? Or is the only upgrade path to make a clean iOS4 install and re-jailbreak/re-install everything?


    Thanks,

    Michael
     
  2. dplxy macrumors regular

    Joined:
    Jun 1, 2010
    #2
    you have to do everything all over again
     
  3. dhlizard macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
    #3
    Or you could buy PkgBackup....

    However, many of the Cydia apps which work on 3.1.2 do not yet work on iOS 4.
     
  4. ClutchThese macrumors 65816

    ClutchThese

    Joined:
    Jun 25, 2010
    Location:
    Alexandria, VA
    #4
    first create a ssh in cydia. then, DOWNLOAD pwnage tool 4.0.1 and create a custom ipsw with the program. Then, replace the /etc/host file with cydia server info and then do a Options-restore with the newly created ipsw.
     
  5. wazza12345 macrumors regular

    Joined:
    Jun 9, 2009
    #5
    Mate can u tell me how to create an ssh with Cydia? Can't see it anywhere in the app!
     
  6. pixelated macrumors 6502a

    pixelated

    Joined:
    Oct 21, 2008
    #6
    I think everything here is misrepresented or just wrong.
    Storing your SHSH (ssh?) through cydia will only store a 4.0 blob, and is in no way relevant to restoring with a custom IPSW, only stock IPSW's.
    Custom FW's bypass apples signature check, but you must be already pwned to use them. (OP: which you can do if you have the old bootrom)
     
  7. wazza12345 macrumors regular

    Joined:
    Jun 9, 2009
    #7
    ok so I'm in the same boat as the OP. What u are saying is we need to install a custom FW over the existing 3.1.2 image we have on our phones?
     
  8. ClutchThese macrumors 65816

    ClutchThese

    Joined:
    Jun 25, 2010
    Location:
    Alexandria, VA
  9. ClutchThese macrumors 65816

    ClutchThese

    Joined:
    Jun 25, 2010
    Location:
    Alexandria, VA
    #9
    Yes, u need to create one with pwnage 4.0.1 then do a options-restore with the custom ipsw. Easy as pie.
     
  10. wazza12345 macrumors regular

    Joined:
    Jun 9, 2009
    #10

    Ooh that's exciting :) didn't realise it was easy. They got a guide for it on the pwnage website? ( 3.1.2 blackrain to 4.0)?
    If I backup by 3.1.2 in iTunes before i start will I b able to go back to it if the pwnage tool doesn't work?
     
  11. TMar macrumors 68000

    TMar

    Joined:
    Jul 20, 2008
    Location:
    Ky
    #11
    A) He isn't even asking how to upgrade to iOS4.
    B) You don't have to edit host file to upgrade.


    OP, you don't want to keep your cydia apps when upgrading to iOS4. I'm sure there would be way to many incompatible apps and it would make the process near impossible/major pain.
     
  12. ClutchThese macrumors 65816

    ClutchThese

    Joined:
    Jun 25, 2010
    Location:
    Alexandria, VA
  13. ClutchThese macrumors 65816

    ClutchThese

    Joined:
    Jun 25, 2010
    Location:
    Alexandria, VA
    #13
    Make sure your /etc/host file has cydias server on the last line.

    There are threads to show how to do this.
     
  14. wazza12345 macrumors regular

    Joined:
    Jun 9, 2009
    #14
    so does this sound right?

    Backup with iTunes
    update /etc/hosts on iPhone with entry for cydia
    create custom ipsw with pwnage tool
    upload ipsw to phone using pwnage tool restore
    enjoy 4.0? :)

    anything I'm missing there? Any shsh blob stuff?
     
  15. TMar macrumors 68000

    TMar

    Joined:
    Jul 20, 2008
    Location:
    Ky
    #15
    You don't have to update your host file to upgrade, that's only for downgrading. Check cydia to make sure your blobs are on file, if not it's to late anyhow.
     
  16. pixelated macrumors 6502a

    pixelated

    Joined:
    Oct 21, 2008
    #16
    Editing the Hosts file and resorting using SHSH has nothing to do with custom FW restores made with Pwnage.
    This method is only for restoring stock FW's (not that editing it for future use will hurt) and will not impact a custom restore at all
     
  17. wazza12345 macrumors regular

    Joined:
    Jun 9, 2009
    #17
    thanks mate. Don't think I have the blobs anyway. But can I still rollback to my current 3.1.2 blackra1n jailbreak if it all goes to shiet with the upgrade to 4.0 using pwnage? And if ao is it just a restore in iTunes then a re:jailbreak with blackrain?


    Thanks again!
     
  18. TMar macrumors 68000

    TMar

    Joined:
    Jul 20, 2008
    Location:
    Ky
    #18
    Open cydia up and see if it shows that you have them on file. Assuming your on a 3gs (since you never said) you will not be able to downgrade if you don't have your SHSH stored via cydia.
     
  19. wazza12345 macrumors regular

    Joined:
    Jun 9, 2009
    #19
    yeh tis a 3gs. I can't see any mention of SHSH being stored in cydia. So I that's the case it's a one way road? I won't b able to go back after I try with the custom ipsw. If I doesn't work I'll be on 4.0 in-jailbroken.
     
  20. TMar macrumors 68000

    TMar

    Joined:
    Jul 20, 2008
    Location:
    Ky
    #20
    [​IMG]

    Do you see any of this?
     
  21. wazza12345 macrumors regular

    Joined:
    Jun 9, 2009
    #21
    thanks for the pic mate. I don't have that at the top of cydia, so looks like I'm out of luck there.
     
  22. BreezyXC60 macrumors member

    BreezyXC60

    Joined:
    Jan 27, 2010
    Location:
    Edmonton, AB
    #22
    Don't you also need to have the old bootrom for it to be an untethered JB? I was thinking about doing it until I found that out, something to think about anyways.

    Edited to add: Sorry-I just saw that pixelated mentioned it. :)
     
  23. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #23
    Yes, that is correct.
    Only old bootroms currently can update to custom 4.0 IPSW
     
  24. wazza12345 macrumors regular

    Joined:
    Jun 9, 2009
    #24
    If I save my shsh now using tiny umbrella would I be able to roll back to 3.1.2? Or did it need to be through cydia a while ago?

    Edit: nevermind, just read some more. Apple will not sign 3.12 or 3.13 shsh any more. :(
     
  25. Genghis Khan thread starter macrumors 65816

    Genghis Khan

    Joined:
    Jun 3, 2007
    Location:
    Melbourne, Australia
    #25
    Thanks for all of the replies guys :)

    On my iPhone, Cydia says I have the SHSH for 3.1.2. So does that mean that I can do this?

     

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