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Thread: Unlocking to OS 4.0

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    Default Unlocking to OS 4.0
    I got an Iphone 3G[S] OS 3.1.3 and Cydia 1.0.3201-71

    When I start Cydia there is a message: This device has a SHSHs on file for Iphone OS 4.0, If i Update my ITunes to OS4.0 can I unlock my iphone and wich program is the best to do it?

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    Retired Moderator iYeow's Avatar
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    Quote Originally Posted by D4rkM1k3 View Post
    I got an Iphone 3G[S] OS 3.1.3 and Cydia 1.0.3201-71

    When I start Cydia there is a message: This device has a SHSHs on file for Iphone OS 4.0, If i Update my ITunes to OS4.0 can I unlock my iphone and wich program is the best to do it?
    If you update your iphone to OS 4.0, you will not be able to unlock as there is no jailbreak yet at iOS 4.0

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    D4rkM1k3 (2010-07-28)

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    Quote Originally Posted by yeow202 View Post
    If you update your iphone to OS 4.0, you will not be able to unlock as there is no jailbreak yet at iOS 4.0
    "This device has a SHSHs on file for Iphone OS 4.0"

    But why Cydia display this message when I start it

  5. #4
    Cydia displays that message to tell you it has the 4.0 file. You may need to use it one day in the future.

    You don't need to be on 4.0 for the SHSH for 4.0 to have been saved. You could download tinyumbrella and backup your 4.0.1 one now while you are still on 3.1.3

    Do you want to upgrade to 4.0? It can be done if you are on old bootrom, but not if you are on new bootrom.

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    D4rkM1k3 (2010-07-28)

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    Quote Originally Posted by westonben View Post
    Cydia displays that message to tell you it has the 4.0 file. You may need to use it one day in the future.

    You don't need to be on 4.0 for the SHSH for 4.0 to have been saved. You could download tinyumbrella and backup your 4.0.1 one now while you are still on 3.1.3

    Do you want to upgrade to 4.0? It can be done if you are on old bootrom, but not if you are on new bootrom.
    I would like to use OS 4.0, but i dont know its a good option, but if I do it, how I know if I'm old bootroom? and what program should use

  8. #6
    Here is a guide for checking the bootrom:
    How to Check iPhone 3GS New Bootrom / Old Bootrom (iBoot) Version | Redmond Pie

    For me, I am happy with 4.0. Some jailbroken apps aren't updated to 4.0 yet, but other than that I think the new features are worth it.

    To do it (ONLY WITH OLD BOOTROM!), you will have to use an unofficial tool called spirit2pwn. It works because I used it 2 days ago to do exactly what you want. Once you have done this, you will have to use pwnagetool or snowbreeze to create a custom firmware for 4.0 and do a shift restore with it in itunes. This will result in you having a jailbroken 3GS at 4.0. Then simply follow the guide for Ultrasnow to unlock.

    Whole process should take about 1hr.

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    D4rkM1k3 (2010-07-28)

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    IOS 4.0 is great on 3GS, you only need to use Spirit2pwn only once to make your Spirit jailbreak at 3.1.3 compatible to use on Custom Firmware after which any future restore , you can just go directly to cfw.
    Last edited by iYeow; 2010-07-28 at 09:00 PM.

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    I used f0recast an it displays me this
    Serial #: xxx952cxx3xx
    Baseband: 05.12.01
    Bootloader: 6.4
    Model: MC135

    Jailbreakable?: Only if SHSHs is saved
    Unlockable?: No
    Tethered?:Maybe- It depends if refurbished

    With this info I know the i don't have the old boot and I can't unclock my iphone, so I have to wait like everybody else, thanx guys for your help
    Last edited by D4rkM1k3; 2010-07-29 at 06:13 AM.

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    That is correct, you have the new bootrom, so do not use custom firmware. Stay at 3.1.3 is the best option for you.
    You don't really have to include the whole serial number, just the first 5 digits from the left is good enough, now the whole world knows your serial number...
    Last edited by iYeow; 2010-07-29 at 12:04 AM.

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    D4rkM1k3 (2010-07-29)

  15. #10
    ok, so i'm also on 3.1.3 /05.12.1 on 3GS, jailbreaked with Spirit and unlockes via Cydia.
    The actual version avalaible is 4.0.1, can i upgrade to this version and still be able to jailbreak and unlock with "comex" recent tool?
    Thanks!

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