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Discuss [Advice] Geohot's IPSF-like unlock technical info/seczone corruption? at the iPhone "2G" (Rev. 1) - Hackint0sh.org; Hey folks, After reading so many things about corrupted seczones of the original IPSF unlock, ...
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    Professional Array akiacat's Avatar

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    Question [Advice] Geohot's IPSF-like unlock technical info/seczone corruption?

    Hey folks,

    After reading so many things about corrupted seczones of the original IPSF unlock, I was wondering if Geohot's IPSF-like unlock does the same corruption to your seczone.

    I searched the forum for this and got different answers all over the threads. I took a quick look at Geohot's blog where he says:

    "(...) And while you are at it, patch the bootloader to validate all tokens. IPSF style unlock w/o touching the seczone. (...)"

    URL:
    http://iphonejtag.blogspot.com/2008/...for-prize.html

    I take this as a statement that the Geohot IPSF-like unlock does NOT corrupt your seczone. Can someone with technical knowledge of how it exactly works (possibily by checking the provided source code) confirm this?

    As more and more people are using ZiPhone to jailbreak and unlock their phones, I was worried about the increasing number of (possibily) broken seczones (as no backup is made by ZiPhone). Geohot's Readme file did not include a warning that you'd have to backup your seczone before patching the bootloader, either.

    PS: While we are at it... If you know what exactly geohot's unlock is doing to the baseband (be it temporary or permanent changes) and what consequences it might have, please post them.

    Thanks in advance!
    Akiacat
    Last edited by akiacat; 02-17-2008 at 02:55 PM.



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    You are talking about two completely different unlocks from geohot.

    The first one is the IPSF-like unlock for 3.9 BL. That one changes your seczone, that's why you should backup it.

    The second one is the 4.6 software unlock he did. In fact he is flashing the 04.02 firmware with the anysim patch already in it.

    What ziphone does, is do the second unlock method for 1.1.2 or 1.1.3 phones.
    If you let it downgrade the bootloader, then you will end with a 04.03 with the anysim patch on it.

    The thing you quote from geo's blog was just thinking about possibilities his new exploits open. In fact, look at his 4.6_GEOMOD bootloader. This one does exactly this, IPSF-style unlock, without touching the seczone, but he has not released it yet, and maybe he never will, because of copyright, bricking risks, etc.

    Hope I answered your questions,

    wildbomb

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    Geohot's IPSF unlock does exactly what IPSF does, but it has nothing to do with his geohots 4.6 hack or Ziphone because neither uses the same IPSF method

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    Quote Originally Posted by wildbomb View Post
    You are talking about two completely different unlocks from geohot.

    The second one is the 4.6 software unlock he did. In fact he is flashing the 04.02 firmware with the anysim patch already in it.

    wildbomb
    So if you restore to 1.1.3 you end up with locked phone. right

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    the IPSF method is, so far, restore resistant...


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    Ah, that explains a lot!
    Thanks for the response!

    Personally I had an original 3.9 iPhone where I backed up the seczone months ago, so that should be safe.

    After buying a few new phones with a 4.6 bootloader, I hardware-downgraded one to 3.9 and ran anySIM. At some point I upgraded to 1.1.3, therefore the new baseband firmware got installed. Finally I used ZiPhone on that phone.
    So now I'm wondering: How does ZiPhone unlock a 3.9/4.03.13_G iPhone? Does it use the anySIM method then?

    And yet another question: What exactly does "Virginze" do? Does it generate a 'clean' seczone and flashes it to the baseband?

    EDIT: I guess THIS (link) is the geohot-IPSF unlock I was worrying about, but it has nothing to do with unlocking 4.6-phones as it "another" 3.9 unlock. The 4.6 unlock geohot released is not screwing up the seczone as far I can see and just patches the firmware itself.
    http://iphonejtag.blogspot.com/2008/...9-exploit.html

    So basically if I used ZiPhone to unlock a OTB 4.6 phone there is nothing I have to worry about, right?


    Thanks again!
    Akiacat
    Last edited by akiacat; 02-17-2008 at 05:25 PM.

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    don't think you have anything to worry about...but, I think it isn't restore resistant as the iPSF-style one...so that's a disadvantage I guess...
    First iPhone user in C.R.
    <---- If I helped you, thumbs up are always cool, thanks

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    My 3.9 BL phone is unlocked with geohot ipsf like unlock, jailbroken and activated with ziphone.
    I have backed up my original seczone, my unlock resists up- and downgrades, restores with itunes. It is also revertable, i can get a clean baseband and seczone whenever I want .
    I tested everything stated above!
    So there is absolutely nothing I have to worry about

    8GB IPhone
    Victim of T-Mobile Germany

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    Default Seczone

    So geo's 4.6 ipsf style unlock doesnt touch the seczone?

    I used Geo's unlock on my 1.1.2 OTB - which worked perfectly i must admit, but then i stupidly did a restore to 1.1.3 - so i dont think i have a backup of my seczone any more.

    If geos 4.6 unlock hack doesnt touch the seczone then i am not in any trouble, however reading about the reversal of Geos hack it mentions you need the backup of your seczone.

    So now i am confused - do i have my original seczone or not?

    If not, and i dont have a backup of it - then what implications does this have.

    Is the only implication the fact that if apple release a new bootloader i will not be able to update to that firmware?

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    If you had and still have a 4.6 bootloader then you didnt do the IPSF style unlock, read wildbombs post


 

 
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