My 3GS is on 4.0 but I want to upgrade to 4.2.1 - What do I need to do?

Discussion in 'Jailbreaks and iOS Hacks' started by Snowscape, Apr 30, 2011.

  1. Snowscape macrumors newbie

    Apr 30, 2011
    Hey guys,

    I've been a bit behind on the JB scene now so I'm unsure of what I need to do here.

    My iPhone 3GS is currently on 4.0, jailbroken with the soft unlock from ultrasn0w and has a baseband of 04.26.08. I want to upgrade to 4.2.1 since I don't seem to see any reports of the ultrasn0w unlock working for 4.3.2 yet?

    I've found the following tutorials at iClarified for:

    Jailbreaking -

    and Unlocking -

    Is it just a case of me restoring to the stock version of 4.2.1 before proceeding with the above? I remember way back when I upgraded to 4.0 I had to use PwnageTool to build the firmware with the old baseband and so forth... is this still something I need to do if I want to keep my current baseband, or is this a redundant step now?

    Really appreciate your help with this guys, thanks in advance!
  2. svenn macrumors 6502

    Aug 11, 2010
  3. eastercat macrumors 68040


    Mar 3, 2008
    In case it's not obvious, you never update through iTunes.
    If you have your blob for 4.2.1, you can update to that iOS.

Share This Page