Updating iOS on unlocked iPhone 3g

Discussion in 'iPhone Unlocking' started by slimsandwich, Aug 24, 2012.

  1. slimsandwich

    slimsandwich New Member

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    Hi all, I have an unlocked iPhone 3g running the 4.2.1 iOS with the 6.15.00 baseband. If I wanted to update the iOS to a newer and recent one, how would I go about doing so?
     
  2. waldoe

    waldoe New Member

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    you wouldn't I believe 4.2.1 is as high as you can go on the 3g.
     
  3. Thomasjtsi

    Thomasjtsi Well-Known Member

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    This is correct... iOS 4.2.1 is the highest version the iPhone 3G supports. However, if you're simply wishing to do a restore of your iPhone... you'll need to create a custom 4.2.1 IPSW, to "Shift-Restore to via iTunes" using redsn0w or sn0wbreeze to preserve the 6.15.00 iPad BB.
     

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