Shift + Click on 'Update' button in iTunes?

Discussion in 'iPhone Tips, Help and Troubleshooting' started by mi986, Jul 23, 2010.

  1. macrumors member

    Jul 29, 2008
    Victoria, Australia
    I know you can Shift + Click on the 'Restore' button in iTunes to restore with a specific .IPSW, but can you do the same with the 'Update' button?

    I want to upgrade an iPhone 3GS on 3.1.3 to 4.0 but I don't want to lose any of the data on it. I have downloaded the 4.0 firmware elsewhere (because my internet is really slow) and want to update using this computer.

    Will this work?
  2. macrumors regular

    Jul 28, 2009
    Sync your 3GS and let it run a full backup and snc then shift+restore
  3. macrumors 6502a

    Jun 20, 2010
    If the firmware update wipes the phone clean then just restore back and it will all come back to how you had it plus the new firmware installed.

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