can i - firmware upgrade question

Discussion in 'Jailbreaks and iOS Hacks' started by ShivamD, Jan 4, 2011.

  1. ShivamD macrumors newbie

    Joined:
    Jan 4, 2011
    #1
    can i upgrade my iphone 4 on firmware 4.02 to 4.1 while 4.2 is out?
    i tried doing it by pressing the option key on my mac and clicking restore and choosing the 4.1 firmware but it gives me an error saying " the iphone cannot be restored at this time because the iphone software update server could not be contacted or is temporarily unavailable"
     
  2. chestvrg macrumors 65816

    Joined:
    Dec 13, 2010
    #2
    I'm having a similar issue, I want to downgrad from 4.2.1 to 4.0.2 so the next time I have to do a restore via itunes it will not un-jailbreak it.
     
  3. maturola macrumors 68040

    maturola

    Joined:
    Oct 29, 2007
    Location:
    Atlanta, GA
    #3
    Yes you can if you got SHSHs for 4.1 saved. If you don't them you cannot.


    this is just no Possible, Jailbreak is a software hack, if you overwrite the software (firmware upgrade) the Software hack will be gone every time. So Everytime you upgrade/update your JB will be gone no matter what version you are (You can use a custom firmware to upgrade to an Already jailbroken firmware, but technically your old JB will be gone, you just replacing it with an already fresh jailbroken fimrware)
     
  4. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #4
    You need shsh blobs to downgrade or restore any i4 or 3GS to any firmware but the latest one out. And every time you restore thru iTunes to official firmware you will lose your jb and be back to stock version.
     
  5. ShivamD thread starter macrumors newbie

    Joined:
    Jan 4, 2011
    #5
     
  6. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #6
    No
    TU retrieves them from cydia, so if tinyumbrella cant retrieve them they are not saved on cydias server.
     
  7. f4780y macrumors 6502

    f4780y

    Joined:
    Jul 21, 2009
    Location:
    Troon, Scotland
    #7
     
  8. maturola macrumors 68040

    maturola

    Joined:
    Oct 29, 2007
    Location:
    Atlanta, GA
    #8
    You cannot retried what you don't have, yes it is possible to retrieve (previously saved) SHSHS from Cydias server. This means that Cydia or yourself save the SHSH and stored them on Cydia server. So you can retrieve them when you need them. But they need to be generated by Apple at some point. If you Never saved 4.1 SHSHs you cannot save them anymore.
     

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