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Thread: Upgrade 3GS 4.1 bb 06.15 to 4.2

  1. #1
    Default Upgrade 3GS 4.1 bb 06.15 to 4.2
    How do I get this done? I have all the necessary files but ITunes gives me an error

  2. #2
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    You need to create a custom firmware for 4.3.3. You can only go to 4.2.x if you have SHSHs. If you do have SHSHs, you're getting an error because you're not using TinyUmbrella's TSS server. That's error 3194. If you're getting error 16xx with a custom firmware, you're not setting it into pwned dfu mode.

    You need to figure out first if you have SHSHs for 4.2.1 before you can proceed. If you don't mind going to 4.3.3, then that's doable too.

    Either way you need to use a custom firmware for that device just because it is on the ipad baseband.

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