Downgrading a 3GS from 4.0 to 3.something

Discussion in 'iPhone' started by Imola Ghost, Aug 1, 2010.

  1. Imola Ghost macrumors 65816

    Joined:
    Mar 21, 2009
    #1
    Is there a way to downgrade my old 3GS OS to something lower? I am selling it and it seems the people interested in it are all wanting to use it on tmobile. I figured I try and do it so it may easier to sell this way.

    Now I don't know anything about jailbreaking or even where to begin so if you have some helpful advice to aid me with this then please do.
     
  2. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #2
    You cannot downgrade a 3GS unless you have shsh blobs saved for any previous built. And judging by your post and that you never jb before you cannot.
    Tell them they will have to wait for a new jb to be out for 4.0 and 4.0.1 and then they can unlock it for Tmobile.
     
  3. Imola Ghost thread starter macrumors 65816

    Joined:
    Mar 21, 2009
    #3
    Thanks buddy, I just edited my for sale post to let every one know that it has iOS 4.0.1, to avoid any more questions about what the phone has. When I posted it I didn't think anything of posting the software version, it just didn't seem like it matter but I guess it does.
     
  4. JayLenochiniMac macrumors G5

    Joined:
    Nov 7, 2007
    Location:
    New Sanfrakota
    #4
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A306 Safari/6531.22.7)

    Download the firmware you want from
    http://www.felixbruns.de/iPod/firmware/  Then hold down Shift (PC) or Option (Mac) in iTunes while you click the Restore button, which will allow you to
    browse to the firmware file you just downloaded and restore that.

    If you get an error while restoring when downgrading to 3.1.3,
    download  http://jaxov.com/2010/05/recboot-iphone-recovery-mode/ and
    run it to kick the iPhone out of recovery and you are done.
     
  5. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #5
    That information is false and will NOT work on a 3GS model.
    Only on 2G and 3G iPhones.
     
  6. JayLenochiniMac macrumors G5

    Joined:
    Nov 7, 2007
    Location:
    New Sanfrakota
    #6
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A306 Safari/6531.22.7)

    I stand corrected.
     
  7. iSaxon macrumors 6502a

    iSaxon

    Joined:
    Jun 19, 2010
    Location:
    Pittsburgh, PA
    #7
  8. impulse462 Suspended

    impulse462

    Joined:
    Jun 3, 2009
    #8
  9. chrisperro macrumors 6502

    chrisperro

    Joined:
    Oct 24, 2009
    Location:
    canada
    #9
    the op may have an old 3gs old bootrom, he may be able to downgrade.
     

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