Unlocked iPhone 4 on 4.0.1, how can I update and keep baseband

Discussion in 'Jailbreaks and iOS Hacks' started by ann713, Apr 14, 2011.

  1. ann713, Apr 14, 2011
    Last edited: Aug 7, 2018

    ann713 macrumors 65816

    Nov 30, 2008
    My phone is jailbroken and unlocked on version 4.0.1. Baseband is still on 1.59.00. What is the highest OS version I can update/unlock to, while preserving the baseband (as of right now)? Is there a detailed guide out there to do so?
  2. Sine Qua Non macrumors member

    Apr 4, 2011
    4.3.2 just came out today. Do NOT update to it through iTunes. You will lose your JB and unlock.

    There is an untethered JB for 4.3.1 for the iPhone 4. The iPhone 4 baseband on 4.3.1 is not unlockable. You can preserve your current unlockable BB and upgrade to 4.3.1 by creating and installing a customized 4.3.1 with PwnageTool. Check the tutorials on iclarified.com for complete instructions.

    This all presumes that you can still save your SHSH for 4.3.1 despite 4.3.2's release today. Your first step should be to download TinyUmbrella IMMEDIATELY and try saving your SHSH.

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