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Thread: iphone 3g on 4.0.1, want to upgrade to 4.1

  1. #1
    Default iphone 3g on 4.0.1, want to upgrade to 4.1
    i have an iphone 3g on 4.0.1 currently jailbroken with jailbreakme. Also using the ultrasn0w unlock. I really would like to update to 4.1. How would i go about doing so since the tutorials ive seen have said that i should previously be jailbroken on redsn0w or others but i havent been jailbroken on those. Ive only jailbroken on jailbreakme.

  2. #2
    Retired Moderator iYeow's Avatar
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    Yes, but you have to downgrade to 3.1.2 first.
    Put your iphone into DFU mode
    Do the Shift + Restore to 3.1.2 ipsw
    Error 1015 pops up, use kick out of recovery from Tiny Umbrella feature
    Now you are at Emergency Screen.
    Run Redsn0w 0.9.4 to hactivate and jailbreak.
    Update Cydia.
    Download Snowbreeze 2.0.2 and download 3g 4.1 ipsw and build your custom firmware which will be placed on your desktop.
    Download ireb 4.1 from www.iH8sn0w.com
    Start ireb 4.1 and follow the instructions
    Now do the Shift + Restore to Snowbreeze_4.1.ipsw
    Once restored you are jailbroken at 4.1
    Unlock again with Ultrasn0w.
    You are all set.

  3. #3
    will i be able to downgrade to 3.1.2 if i dont have my SHSH saved from then?
    this iphone has only been jailbroken on 4.0.1 using jailbreakme. Also, will all this work with windows?
    I cant have this phone lock on me.

  4. #4
    Retired Moderator iYeow's Avatar
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    Oops, are you talking about 3g or 3gs?

    For 3G, you do not need shsh blogs to restore to 3.xx firmware, 3Gs you do need those shsh blogs.

    That is why , i didn't mention anything about shsh blogs in my instructions.
    Last edited by iYeow; 2010-10-03 at 04:55 AM.

  5. #5
    iphone 3G.
    This will work on windows?

  6. #6
    Retired Moderator iYeow's Avatar
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    yes, it will. Becareful not to select the stock 4.1 ipsw when restoring.

    After the Snowbreeze part, you can skip using Ireb 4.1, you may not get any error.
    Last edited by iYeow; 2010-10-03 at 05:12 AM. Reason: Automerged Doublepost

  7. #7
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    Hi can I just use 3.1.3 that I already have in order to use 4.1 or do I have to re-downgrade to 3.1.2 first?? Many thanks

  8. #8
    Retired Moderator iYeow's Avatar
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    Yes, you can

  9. #9
    Do you need the ireb 4.1 phase if the 3G is still in Jailbroken 3.1.2 phase?
    Can you Shift + Restore a Snowbreeze_4.1.ipsw file generated on a PC using a MAC iTunes?
    Thanks

  10. #10
    Retired Moderator iYeow's Avatar
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    Yes, the snowbreeze_4.1.ipsw can be transferred to a Mac machine and do the restore

  11. #11
    Thanks.
    Do you still need the ireb 4.1 step if the 3G is still in Jailbroken 3.1.2 phase already?

  12. #12
    Quote Originally Posted by yeow202 View Post
    Yes, but you have to downgrade to 3.1.2 first.
    Put your iphone into DFU mode
    Do the Shift + Restore to 3.1.2 ipsw
    Error 1015 pops up, use kick out of recovery from Tiny Umbrella feature
    Now you are at Emergency Screen.
    Run Redsn0w 0.9.4 to hactivate and jailbreak.
    Update Cydia.
    Download Snowbreeze 2.0.2 and download 3g 4.1 ipsw and build your custom firmware which will be placed on your desktop.
    Download ireb 4.1 from iH8sn0w.com | Jailbreak your iPod touches and iPhones
    Start ireb 4.1 and follow the instructions
    Now do the Shift + Restore to Snowbreeze_4.1.ipsw
    Once restored you are jailbroken at 4.1
    Unlock again with Ultrasn0w.
    You are all set.
    Where do I download the 3g 4.1 ipsw?

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