4.2.1. Iphone 4 bundle preserve baseband?

Discussion in 'iPhone' started by arram, Dec 28, 2010.

  1. arram macrumors member

    Joined:
    May 7, 2009
    #1
    If I use a 4.2.1 bundle for pwangetool, will it preserve my 1.59 baseband? I know it will be tethered but I have no choice since my company exchange email doesn't work on 4.01. I just want to make sure it preserves my baseband if I use the bundle. thanks
     
  2. Applejuiced, Dec 28, 2010
    Last edited: Dec 28, 2010

    Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #2
    Pwnage hasnt been updated yet to create custom 4.2.1 IPSW's.
    The only way you can JB 4.2.1 is Redsnow and that doesnt preserve your baseband.
    I heard if you update while running Tinyumbrella's TSS sever in the back you can preserve your unlockable baseband. But remember, Update dont click restore.
    You will have to kick device out of recovery once its done and gives you an error message.
    Up to you but I'd wait a week or two for the untethered JB to be released.
     
  3. arram thread starter macrumors member

    Joined:
    May 7, 2009
    #3
    I know but you can download a 4.2.1 iphone 4 bundle for it to work. I already made the custom 4.2.1 firmware, just making sure its ok to use it without upgrading baseband
     
  4. ssdeg7 macrumors 6502a

    ssdeg7

    Joined:
    Jul 15, 2010
    #5
    +1
     
  5. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #6
    Oh, I see.
    Not sure about the custom bundle for it.
    I'd wait for an official release personally.
    Baseband is something that if you mess up you can never go back.
     
  6. arram thread starter macrumors member

    Joined:
    May 7, 2009
    #7
    im getting an error 21 in itunes when I try doing that tinyumbrella method. I press update and then gives me that error without even updating it. strange
     
  7. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #8
    Interesting.
    It doesnt go thru the update process at all?
    You try kicking it out of recovery with TU?
     
  8. arram thread starter macrumors member

    Joined:
    May 7, 2009
    #9
    it says extracting software and makes couple noises but comes with an error 21. Then I have to kick it out of recovery for it to go back to 4.01. Updated new itunes but still nothing
     
  9. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #10
    Damn, there was a few people swearing up and down that it does work but I havent tested it out myself.
    Let me go look for that thread.

    http://www.iphone4jailbreak.org/how-to-upgrade-ios-4-2-1-preserving-baseband.html
    http://forums.macrumors.com/showthread.php?t=1059740&highlight=tinyumbrella
     
  10. arram thread starter macrumors member

    Joined:
    May 7, 2009
    #11
  11. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #12
    Interesting.
    I didnt think it would work in the first place but there's some that claim they have done it.
    Weird...
     
  12. arram thread starter macrumors member

    Joined:
    May 7, 2009
    #13
    and surprised i cant find anyone trying the 4.2.1 bundle in pwangetool to preserve baseband. I would think that would work fine but would like to get some verification
     
  13. arram thread starter macrumors member

    Joined:
    May 7, 2009
    #14
    I can confirm this method works fine.
     

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