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  1. dmbrown81's Avatar
    My iphone 3gs running 3.1.3 spirit jailbroken is acting kind of buggy and I think I need to restore. I want to try out os4 but I don't want to jack things up and lose my jailbreak. My Baseband: 05.12.01 - 6.4_M3S2 therefore I don't think I can jailbreak that. But if I do upgrade to os4 can I still downgrade back to 3.1.3?
    "There's A Party In My Tummy"
    2010-07-02 06:54 PM
  2. douflag's Avatar
    As long as you have stored your 3.1.3 SHSHs, then you should be fine. Otherwise, you will lose all JBs/unlocks.
    Last edited by douflag; 2010-07-02 at 07:35 PM.
    2010-07-02 07:17 PM
  3. Cer0's Avatar
    If you have the new bootrom then you cannot jailbreak 4.0.

    If you SHSH is on file for 3.1.3 then it is best to restore back to 3.1.3 with Sauriks redirect.
    2010-07-03 02:17 AM