iphone 3gs 4.2.1 jb question

Discussion in 'Jailbreaks and iOS Hacks' started by shariain, Jan 18, 2011.

  1. shariain macrumors newbie

    Joined:
    Jan 29, 2010
    #1
    i have searched the forum for answers to this question and looked through the sticky on new to iphone.

    is it possible to JB this iphone 3gs 4.2.1 modem firmware 05.15.04. if so what is the best way to do it for an un-tethered JB.

    thanks
     
  2. hackthatphone macrumors 68000

    hackthatphone

    Joined:
    Jul 28, 2010
    #2
    Sure there is, provided the phone is the old bootrom version.
     
  3. Steven Jobson macrumors regular

    Joined:
    Jan 13, 2011
    #3
    The only way at this point to jailbreak your iPhone 3GS 4.2.1 untethered is if you:

    1. Have a Mac
    2. Have SHSH blobs saved for 4.2b1 which you mostly don't.
    3. Are a developer with a legitimate copy of the 4.2b1 ipsw which you most likely aren't.

    But you can jailbreak tethered using the latest redsn0w.
     
  4. shariain thread starter macrumors newbie

    Joined:
    Jan 29, 2010
    #4
    thanks for the reply silly question how do i find out what bootrom i have
     
  5. Steven Jobson macrumors regular

    Joined:
    Jan 13, 2011
    #5
    Look at the serial number. Settings, general, about.

    Look at the 4th and 5th numbers. If it is larger than 45, most likely cannot be untethered
     
  6. shariain thread starter macrumors newbie

    Joined:
    Jan 29, 2010
    #6
    the last two numbers are 48 so what are my opions now for jb this iphone.
     
  7. Steven Jobson macrumors regular

    Joined:
    Jan 13, 2011
    #7
    I already told you. Use the latest redsn0w and download iPhone 3GS 4.2.1 firmware from felixbruns. The instructions in redsn0w are self-explanatory.
     
  8. Sedrick macrumors 68030

    Sedrick

    Joined:
    Nov 10, 2010
    #8
    Do you have to have BOTH #2 and #3 to do the untethered JB?
     
  9. Steven Jobson macrumors regular

    Joined:
    Jan 13, 2011
    #9
    Yes. That is why they are listed under The only way at this point to jailbreak your iPhone 3GS untethered...
     
  10. Sedrick macrumors 68030

    Sedrick

    Joined:
    Nov 10, 2010
    #10
    My bad. Sorry to ruffle your feathers.
     
  11. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #11
    Only a tethered jb is available right now.
     

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