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Discuss Theoretical thought..about Unlock OTB 1.1.2 at the iPhone "2G" (Rev. 1) - Hackint0sh.org; Well, as we all know the main problem with OTB 1.1.2 is that the bootlader ...
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    Question Theoretical thought..about Unlock OTB 1.1.2

    Well, as we all know the main problem with OTB 1.1.2 is that the bootlader was changed to 4.6, thus we cannot use and bbupdate, ieraser etc..

    as far as i remember Apple updated the bootlaoder before on 1.0.2 to 3.9

    Well, could it be possible to downgrade to 1.0.1, then apply 1.0.2 which will flash the bootloader back to 3.9 ?




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    Quote Originally Posted by asus1980 View Post
    Well, as we all know the main problem with OTB 1.1.2 is that the bootlader was changed to 4.6, thus we cannot use and bbupdate, ieraser etc..

    as far as i remember Apple updated the bootlaoder before on 1.0.2 to 3.9

    Well, could it be possible to downgrade to 1.0.1, then apply 1.0.2 which will flash the bootloader back to 3.9 ?

    I Dont Think you can Downgrade the Bootloader, but maybe u can remove the bootloader and then downgrade to like 1.0.1 and upgrade to 1.1.1 and then get 3.9.?



    Interesting topic BTW

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    No, because restoring to 1.0.1 does not replace the current baseband. Because the baseband can only be "upgraded" via an update/restore. Replacing the baseband can only be done by bbupdater or whatever. So since the baseband will remain as it is after restoring to 1.0.1, it is of no use.

    Also more important than this, is the point that, no firmware restore/update can change the bootloader from 4.6 to 3.9. So what you are suggesting is unfortunately useless.

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    I am not sure about that. Well, at the moment it looks, that its impossible to step back. But.... theoretically spoken.... if Apple encounters a serious bug and there is no way for them to downgrade... this might be a financial fiasko for them. Am i right?

    the conclusion is:
    it is possible to erase the actual baseband and replace it with an older baseband. There must be a backdoor for Apple.

    ...just my two cents.

    Any comments on this?

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    We are talking about different things.

    One thing is the Bootloader, another is the baseband, and finally comes the OS.

    The current bootloader is 4.6 (previously was 3.9), the current baseband is 04.02.13_G (previously was 04.01.13_G) and the current OS version is 1.1.2 (previously was 1.1.1). These 3 things operate independently and update intependently too.

    These are the things you can do with each of the 3 components:

    1) You can tecnically upgrade the bootloader, but in the real world, it will not change, apple will not change the bootloader never, so, the bootloader that comes with your phone when you buy it, is the bootloader that it will have forever. At least there is no sign that apple want to update it at this time.

    2) You can update/downgrade the baseband, with the proper secpack of course (the secpack is some sort of a key to open the baseband in read/write mode). Since we don't have the proper secpack for the version 04.02.13_G we cannot modify it in ANY way. We need to wait until we have that secpack in order to start trying something to that baseband. A valid secpack for this baseband will hopefully released in the next iphone upgrade.

    3) You can upgrade and downgrade the OS of the phone pretty mucho without any hassles, you can go from 1.1.2 to 1.1.1 and then 1.0.2 and then go up. This can be done by "restoring" the phone with the desired OS (is also called firmware).

    Hope this help.
    Last edited by hal9000mx; 12-11-2007 at 06:27 AM.


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    sorry about my english but i put a thread about something i did
    i did downgrade bb whit update/restore from itunes
    very strange because i was in 1.1.2 unlocking with anysim from french iphone and connect it to pc and frezed, in there i had 4.02 bb and bl 3.9 . i downgrade to 1.1.1, and gave strange msg "not able to make/recieve calls, contact apple for support, ur iphone need to be repair" on the iphone screen so i tried to jailbreak and didnt be able to make *#307# so i downgrade to 1.0.2 and m surprise was that instead of having 1.0.2 4.02.13 bl 3.9 i had 03.18.... bl 3.9 so itunes was forced to downgrade bb somehow i mange to corrupt it that bad that itunes restore everithing

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    Quote Originally Posted by hal9000mx View Post
    We are talking about different things.

    One thing is the Bootloader, another is the baseband, and finally comes the OS.

    The current bootloader is 4.06 (previously was 3.9), the current baseband is 04.02.13_G (previously was 04.01.13_G) and the current OS version is 1.1.2 (previously was 1.1.1). These 3 things operate independently and update intependently too.

    1) You can tecnically upgrade the bootloader, but in the real world, it will not change, apple will not change the bootloader never, so, the bootloader that comes with your phone when you buy it, is the bootloader that it will have forever. At least there is no sign that apple want to update it at this time.

    2) You can update/downgrade the baseband, with the proper secpack of course (the secpack is some sort of a key to open the baseband in read/write mode). Since we don't have the proper secpack for the version 04.02.13_G we cannot modify it in ANY way. We need to wait until we have that secpack in order to start trying something to that baseband. A valid secpack for this baseband will hopefully released in the next iphone upgrade.

    3) You can upgrade and downgrade the OS of the phone pretty mucho without any hassles, you can go from 1.1.2 to 1.1.1 and then 1.0.2 and then go up. This can be done by "restoring" the phone with the desired OS (is also called firmware).

    Hope this help.
    It is not a problem about the baseband, it is a problem about the bootloader. In fact we can modify the 04.02.13_G baseband but the problem is that the new bootloader does not allow us to reach the baseband. The secpack is needed to open the door to the baseband which was open in bootloader 3.9 (was opened by the Dev Team) and has been closed by Apple by the bootloader 4.6.

    I just wanted to avoid a confusion. In summary, baseband 04.02.13_G came with the 1.1.2 update, it is unlockable via anySIM 1.2u, but for the bootloader version of 3.9, not 4.6 unfortunately....

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    Quote Originally Posted by Omaar View Post
    It is not a problem about the baseband, it is a problem about the bootloader. In fact we can modify the 04.02.13_G baseband but the problem is that the new bootloader does not allow us to reach the baseband. The secpack is needed to open the door to the baseband which was open in bootloader 3.9 (was opened by the Dev Team) and has been closed by Apple by the bootloader 4.6.

    I just wanted to avoid a confusion. In summary, baseband 04.02.13_G came with the 1.1.2 update, it is unlockable via anySIM 1.2u, but for the bootloader version of 3.9, not 4.6 unfortunately....
    No, the problem IS the baseband, at the end, the final goal is to modify the baseband to make it works with any SIM, the problem with the bootloader is that this new bootloader (version 4.6) closes the holes the previous (version 3.9) had which allow us to reach and modify the baseband. As today we need either one of these in order to archieve the final goal (which as i mentioned, is to modify/rewrite/change the baseband):

    Available option:

    Option A) We need to find a hole in the bootloader 4.6 that allow us to reach the baseband or

    Option B) We find the correct secpack for the baseband 04.02.13_G, in order to erase it/change it/modify it.

    My 2 cents.

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    Well...

    all the questions you guys have can be found here.

    http://www.hackint0sh.org/forum/showthread.php?t=18493

    Bootloader and bandband both cannot be downgraded by any method. That is why we are stuck.

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    Quote Originally Posted by hal9000mx View Post
    No, the problem IS the baseband, at the end, the final goal is to modify the baseband to make it works with any SIM, the problem with the bootloader is that this new bootloader (version 4.6) closes the holes the previous (version 3.9) had which allow us to reach and modify the baseband. As today we need either one of these in order to archieve the final goal (which as i mentioned, is to modify/rewrite/change the baseband):

    Available option:

    Option A) We need to find a hole in the bootloader 4.6 that allow us to reach the baseband or

    Option B) We find the correct secpack for the baseband 04.02.13_G, in order to erase it/change it/modify it.

    My 2 cents.
    This has been covered many times. Even if we could write to the baseband how we get by the bootloader check? At this point I believe the best bet is to downgrade the bootloader to 3.9, which had that bad signature checking. Although downgrading the bootloader is looking impossible.


 

 
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