Highest firmware a 3GS can be restored to?

Discussion in 'iPhone' started by ann713, Oct 17, 2011.

  1. ann713 macrumors 65816

    Nov 30, 2008
    Hi all, I haven't done this in a while so I appreciate any help. I need to restore an 8GB 3GS back to a firmware that will still permit be to unlock and run an untethered jailbreak, believe it's currently unlocked on 4.2.1 right now. What is the highest firmware I can custom restore back to?
  2. Joell macrumors member

    Feb 16, 2010
    if you've backed up your SHSHs through cydia you can restore to anyone of those
    restoring to iOS 5 is still tethered so be cautious

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