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Discuss [TechQuestion] Why 3.9BL is needed for 4.03.13 ? at the iPhone "2G" (Rev. 1) - Hackint0sh.org; Why is the 3.9BL needed for 4.03.13 (baseband from 1.1.3) ? exploits in 4.6 are ...
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    Default [TechQuestion] Why 3.9BL is needed for 4.03.13 ?

    Why is the 3.9BL needed for 4.03.13 (baseband from 1.1.3) ?
    exploits in 4.6 are making possible flashing any baseband, but are there a additional checks in 1.1.3 baseband ?

    thanks for info.

    Mati.



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    Senior Professional Array TJ2K7's Avatar

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    I think it's because on the 3.9 bootloader in order to flash the baseband EITHER a newer or a current secpack must be used.
    But on 4.6 you must have a newer secpack and a current secpack can't be used.
    Therefore they can't unlock a baseband until a newer baseband comes out unlike the 3.9 bootloader


    I think that is right , but i'm no expert

    Last edited by TJ2K7; 02-16-2008 at 08:50 PM. Reason: Typo
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    I don't think so.

    gunlock is able to erase whole 4.03.13 baseband and reflash 4.02.13 - using exploit with changing erase regions in unsigned region of secpack

    Code:
    		const char efakesec[]={0x00,0x00,0x02,0xA0,0x00,0x00,0x3D,0x00,0x00,0x00,0x3D,0x00,0x00,0x00,0x00,0x00};	//full range including main fw...
    	//2nd exploit variant for >=1.1.3
    		memcpy(&rsecpack[0x780],efakesec,0x10);
    		sendsecpack(rsecpack);
    		endsecpack();
    		erase(0xA03D0000,0xA03F0000,1);	//the only secpack free allowed erase :)
    So, as far as I understood, we're able to flash 4.03.13, too ...

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    Senior Professional Array TJ2K7's Avatar

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    I said i wasn't a expert

    They can flash the baseband but they can't unlock it right...?
    I'm sure i heard that somewhere
    I'm probably totally wrong!

    A senior member with knowledge will have the answer soon .

    Sorry i couldn't help
    UK Pwned 3.0 iPhone. Successfully connected to the Orange UK Network.

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    they must be some additional sig checks into 4.6, which making BB patching impossible. But using exploit -0x2000 we can write unsigned to the BB, so the checks must be done on-the-fly during start. (what's "full range check" ?)

    Sorry, I just trying to understand the reason, seems some work with IDA will be needed ...


 

 

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