Trying to downgrade to 3.1.2 from 3.1.3 on the iPhone 3G Any Help?

Discussion in 'Jailbreaks and iOS Hacks' started by CalvColl, Feb 22, 2010.

  1. CalvColl macrumors newbie

    Joined:
    Jan 25, 2009
    #1
    I, in the past downloaded 3.1.3 from Apple as I thought I had no need for jailbreaking my iPhone 3G. Now I have decided to jailbreak it, I want to use blackra1n as I know it works on 3.1.2 but not on 3.1.3. I would not like to use any other type of jailbreak as I'm sticking to blackra1n. Is there anyway to downgrade my firmware as I need to do it soon I'm stuck.

    P.S : I don't need to unlock the phone.
     
  2. dhlizard macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
    #2
    If it's a 3G, just restore it to 3.1.2, then use Blackra1n to JB.
     
  3. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #3
    To downgrade you will have to use a shift-restore (Win) or option-restore (Mac) in iTunes and select the 3.1.2 firmware. You may need to be in DFU mode to downgrade.
     
  4. alanh087 macrumors newbie

    Joined:
    Feb 24, 2010
    #4
    may i downgrade to 3.1.2 im on the 3.1.3 and im desperate to jailbrake my ihphone 3gs
     
  5. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #5
    3GS is different. It can't be downgraded without special signatures saved for each firmware. It's too late to get those signatures, since Apple no longer will sign firmwares prior to 3.1.3. Basically, they'll only let you have the latest firmware.
     

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