iPhone Keep unlock while upgrading jailbroken iphone from iOS 4.1 to 5.1?

Discussion in 'Jailbreaks and iOS Hacks' started by jonsn0w, Apr 27, 2013.

  1. jonsn0w macrumors newbie

    Joined:
    Apr 27, 2013
    #1
    I have a jailbroken, unlocked 3GS running iOS 4.1. The baseband is 06.15.00, which I want to keep. I'd like to upgrade to iOS 5.1.1 without losing the untethered jailbreak and (non-carrier) unlock, assuming that's possible.

    Would I be able to achieve this using redsn0w, or should I use something else?
    Is it sufficient to have the SHSH blob listed in Cydia, or do I need to save them to the pc?
    If I need to unlock in a separate procedure, what are the steps for that?

    I've backed up my phone files, verified that I have 5.1.1 SHSH blob saved in Cydia, downloaded the appropriate 5.1.1 ipsw file from this list, and installed redsn0w.

    I'm not sure which tutorial to follow from here...:confused:
     
  2. sbddude macrumors 6502a

    Joined:
    Sep 27, 2010
    Location:
    Nor Cal, USA
    #2
    Use red snow to downgrade baseband to an unlockable one, then build a custom firmware to preserve that baseband
     
  3. darricksailo macrumors 601

    darricksailo

    Joined:
    Dec 18, 2012
    #3
    I believe you need to downgrade the baseband before updating the firmware
     
  4. jonsn0w thread starter macrumors newbie

    Joined:
    Apr 27, 2013
    #4
    Pardon the delayed response. I've finally had some time to read up on this and have more questions. Bear with me, I'm still learning. Am I on the right track?

    1. Use redsn0w 0.9.15b2 to downgrade baseband to 5.13.04 (I plan to follow this tutorial)

    -After completing baseband downgrade, how do I re-unlock and jailbreak? Does it matter which is done first?
    -Do I need to look for a tutorial specifically for untethered jailbreak, or is there an option to choose untethered in redsn0w?
    -I currently have ultrasn0w installed. Would that still be there after the bb downgrade?

    Is that done by clicking Create Custom IPSW button in redsn0w, and then selecting the iPhone2,1_5.1.1_9B206_Restore.ipsw file? If not, could you clarify further?

    Once the firmware is updated and the JB & unlock is done, do I use redsn0w again to get back to the 6.15.00 baseband - or does this need to be done in an earlier step?

    Thanks in advance for your patience.

    Additional phone info:
    -new bootrom 359.3.2
     
  5. dhlizard macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
  6. jonsn0w thread starter macrumors newbie

    Joined:
    Apr 27, 2013
    #6
    That's the same tutorial I linked in my post. Thanks anyway. I'm glad I got that part right, at least.
     
  7. dhlizard macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
    #7
    It works if you follow the instructions correctly.
    You have to re-flash the iPad baseband
    You have to use the older version of Redsn0w as the details in the tutorial show - the newer versions of Redsn0w will not work.
    You run the downgrade procedure until it works.

    Hundreds of thousands have successfully used this procedure to downgrade.
     

Share This Page