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Thread: 3GS will NOT downgrade

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    Default 3GS will NOT downgrade
    I have a 3gs and no matter what i do it will not downgrade. I downloaded the specific software for 3gs and itunes keeps giving me an error message firmware file invalid straight away.

    Any ideas? Cheers

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    iPhoneaholic
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    do you have you SHSH's?

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    No. Are they files? I know how to ssh into the phone. But only if its jailbroken right

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    Retired Moderator iYeow's Avatar
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    Quote Originally Posted by onlinegamesnz View Post
    I have a 3gs and no matter what i do it will not downgrade. I downloaded the specific software for 3gs and itunes keeps giving me an error message firmware file invalid straight away.

    Any ideas? Cheers
    Invalid usually means the wrong firmware, you can download from here :
    iClarified - iPhone - Where To Download iPhone Firmware Files From
    and it should be ipsw format, if it is downloaded as .zip or .rar, rename the ext from .zip to .ipsw.

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    Yea this is the thing. Its the correct firmware. Its specifically for iphone3gs an its ipsw but no matter what i try it wont downgrade

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    iPhone? More like MyPhone SnR's Avatar
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    If you have the new bootrom 3GS you need to have SHSH backups to restore to the previous firmware. Back up your SHSH with firmware upbrella:
    The Firmware Umbrella
    There are many guides on youtube on how to do this.

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    Retired Moderator iYeow's Avatar
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    What type of error are u getting?

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    Its a popup error straight away when i try to restore. Its immediately comes up saying invalid firmware file

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    Retired Moderator iYeow's Avatar
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    Hmmmm, never seen that before, and you have the latest iTunes, right?

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    Perhaps its the wrong firmware for the device. Still wouldnt be able to do anything anyway without SHSHs.

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    Yea latest itunes. Its real weird cus its straight away. Its almost like the firmware file is completely invalid. I click it it comes up instantly

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    Retired Moderator iYeow's Avatar
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    Have you tried on a different pc? It is possible some of your windows files or Itunes are corrupted.
    Last edited by iYeow; 2010-09-10 at 06:33 AM.

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    iPhone? More like MyPhone SnR's Avatar
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    Are you positive you are downloading the correct firmware and it isn't getting corrupted?

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    +1....redownload the firmware from the link yeow gave you, use either chrome, firefox, or opera, not Internet Explorer or Safari and try again, also as stated if you don't have shsh's saved locally using tinyumbrella or on saurik's server then you will not be able to restore to any firmware that apple isn't signing

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    yes i know...but im not even getting as far as apple checking for a signed copy of the firmware.

    ive tried it on another pc and same thing. this is the firmware im using.

    http://appldnld.apple.com/iPhone4/06...6_Restore.ipsw

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    Retired Moderator j3st3r's Avatar
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    have you tried redownloading from the link yeow gave you or the download section of these forums

  17. #17
    I think you need to downgrade your iTunes to pre version 9.1 like 9.0.3, 9.0.2 or 9.0.1. I remember when I tried I had to downgrade iTunes 1st before I downgraded firmware. Also you will need to delete your iTunes library or copy & paste it elsewhere in your computer because an older version of iTunes won't work. It will say it does not recognize your library & iTunes won't open because this library was created by a newer version of iTunes! I think, DOH!

  18. #18
    Quote Originally Posted by yeow202 View Post
    Invalid usually means the wrong firmware, you can download from here :
    iClarified - iPhone - Where To Download iPhone Firmware Files From
    and it should be ipsw format, if it is downloaded as .zip or .rar, rename the ext from .zip to .ipsw.
    Ditto & I had to change the ext. from .rar to .ispw. Also when I located the file in my downloads folder I had to click on unblock in the files properties. It kept saying it was blocked cuz it was from another computer.

  19. #19
    Quote Originally Posted by j3st3r3 View Post
    +1....redownload the firmware from the link yeow gave you, use either chrome, firefox, or opera, not Internet Explorer or Safari and try again, also as stated if you don't have shsh's saved locally using tinyumbrella or on saurik's server then you will not be able to restore to any firmware that apple isn't signing
    Ya dude, without ur blobs on file u will be shshOL!

  20. #20
    Retired Moderator Orby's Avatar
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    That link you're using for firmware (the appldnld.apple.com one) is the official source of the firmware--the file's good, odds are.

    Does the error say "the device is ineligible for this build," does it say "the firmware file is not compatible" or does it say "invalid firmware file (or something to that effect)?"

    I'm thinking the IPSW itself is not the problem here... we can have you run some tests on it to check the integrity of the file if need be.
    Last edited by Orby; 2010-09-10 at 09:26 AM.

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