1. yoyo-man's Avatar
    My 3GS is currently at 3.1.3 and would like to upgrade firmware to 4.0.1. Can anyone tell me how to this?
    Tried the shift + restore and my 3gs is stuck at restore screen with USB cable and itunes.

    Itunes 9.2.1
    2010-08-12 06:12 AM
  2. PWNsyst3m's Avatar
    You have to activate it through iTunes with a sim card from the carrier it is locked to. Ex. USA = AT&T
    2010-08-12 06:20 AM
  3. Bassface's Avatar
    Don't do a shift restore, just do a normal restore. However, this will install 4.0.2, but that is also jailbreakable.
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    2010-08-12 07:15 AM