What is the latest iPhone Firmware?

Discussion in 'iPhone' started by xDeathReaperx, Feb 19, 2011.

  1. xDeathReaperx macrumors regular

    May 3, 2009
    What is the latest iPhone Firmware, I need to update my iPhone 3g and Jailbreak & Unlock it.

    Is the latest Firmware 4.2.1?
  2. ECUpirate44 macrumors 603


    Mar 22, 2010
  3. ulbador macrumors 68000


    Feb 11, 2010
    Be careful though. Depending on what your version is, you probably want to build a custom IPSW with PwnageTool so you don't lose your unlock.

    If you accidently upgrade you can still unlock, but not without issues. You can replace the stock 4.2.1 baseband with the iPad one, but it makes some pretty major and permanent changes (and breaks a few things like GPS).

    With a little bit of planning and assuming you haven't already just upgraded to stock, you can avoid this and keep your unlockable (and perfectly working) baseband but upgrade to the latest firmware version.

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