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Thread: Question about upgrading 3GS to 4.0 (unlock/jailbreak)

  1. #1
    Default Question about upgrading 3GS to 4.x (unlock/jailbreak)
    I have two iPhone 3GS's, both are ALREADY jailbroken and unlocked using jailbreakme.com = Cydia + ultrasn0w

    1st iPhone 32GB
    OS - 3.1.3(7E18)
    Modem Firmware - 05.12.01
    Bootrom - [iBoot-359.3]


    2nd iPhone 16GB
    OS - 4.0(8A293)
    Modem Firmware - 05.13.04
    Bootrom - [iBoot-359.3]

    I don't have SHSH blobs for either of these, only the latest 4.1 as these were never jailbroken or touched before.

    I read that you can unlock/jailbreak 4.1 IF you have the old bootroom, which it appears I do, is this possible? If so, please link me to a guide!


    If not, I want to atleast get the 3.1.3 to 4.0, is that possible without SHSH Blobs saved?
    Last edited by kromix; 09-15-2010 at 12:02 PM.

  2. #2
    iPhoneaholic
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    there is a guides section that ios dedicated to guides for the stuff that you need.... you need to have SHSH's for 3.1.2 and then jailbreak and some other stuff is how it starts i think

  3. #3
    Thanks, anyone have better info than that?

  4. #4

  5. #5
    Super Moderator iYeow's Avatar
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    Quote Originally Posted by kromix View Post
    I have two iPhone 3GS's, both are ALREADY jailbroken and unlocked using jailbreakme.com = Cydia + ultrasn0w

    1st iPhone 32GB
    OS - 3.1.3(7E18)
    Modem Firmware - 05.12.01
    Bootrom - [iBoot-359.3]


    2nd iPhone 16GB
    OS - 4.0(8A293)
    Modem Firmware - 05.13.04
    Bootrom - [iBoot-359.3]

    I don't have SHSH blobs for either of these, only the latest 4.1 as these were never jailbroken or touched before.

    I read that you can unlock/jailbreak 4.1 IF you have the old bootroom, which it appears I do, is this possible? If so, please link me to a guide!


    If not, I want to atleast get the 3.1.3 to 4.0, is that possible without SHSH Blobs saved?
    The first Iphone, I can get you to 4.0, jailbreak your 3.1.3 with with Spirit, make sure you do not use Itunes 9.2, it won't work, use Itunes 9.1 to jailbreak your 3.1.3 first, then go to Cydia, and install Spirit2pwn ( you have to google search for the repo to install ).
    Once you have installed Spirit2pwn, now you can create a custom firmware of iOS 4.0 and restore your iphone to that CFW.

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