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Discuss Downgrading 1.1.2 > 1.1.1 > 1.0.2 at the iPhone "2G" (Rev. 1) - Hackint0sh.org; I've unlocked my friends iPhone 1.1.1 using anySim 1.1. Today he updated to 1.1.2, so ...
  1. #1
    Senior Professional Array Boiling Ice's Avatar

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    Exclamation Downgrading 1.1.2 > 1.1.1 > 1.0.2

    I've unlocked my friends iPhone 1.1.1 using anySim 1.1. Today he updated to 1.1.2, so the phone is locked now.

    here is what I'm trying to do, is to full downgrade including baseband to 1.0.2 and then update to 1.1.1 only.

    Here is what I've done so far
    1)pressed the home and power button for 10 seconds, then released the power button but kept pressing the home button till iTunes reported that iPhone is in recovery mode.
    2)restored to 1.1.1, completed with error 1015
    3)using independence 1.2.5, I've entered the DFU mode.
    4)restore to 1.0.2, completed with error 1013
    5)activated and installed ssh via independence.
    6)uploaded bbupdater, ieraser, ICE03.14.08_G.fls, ICE03.14.08_G.eep, and seckpack to /usr/bin
    I've used those files many times to downgrade baseband from 4.1.13 to 3.14.08
    7)ssh to iPhone
    8)run "launchctl remove com.apple.CommCenter"
    9)run "bbupdater -v" to check the baseband and shows 4.02.13
    10)run "ierase" hope it will erase the baseband, but here comes the problem. it starts and hangs with the last line saying "Waiting for data..."

    I've tried this several times, I even rebooted the iPhone, but still it doesn't go beyond "Waiting for data..."

    anyone have an idea why I'm having such problem?


    ****************** EDIT *********************
    after trying sooooo many times, ieraser completed with the following
    ====================
    -sh-3.2# ieraser
    Resetting the Baseband...Done
    Opened: /dev/tty.baseband
    iEraser: tool by geohot
    thanks to gray and the dev team for the implementation
    thanks to nightwatch for the awesome toolchain
    and thanks to anonymous, iProof, lazyc0der, and dinopio for the idea for this cool trick
    this tool erases your main fw, starting at 0x20000. you need this for the testpoint to work
    you need a file called secpack matching your current firmware version in this folder
    see http://iphonejtag.blogspot.com for instructions on finding this file
    Waiting for data...
    Got Header: 77 0b cc
    02 00 85 00 02 00 FF FF 85 02 03 00
    SECPACK
    02 00 04 02 06 00 01 00 00 00 00 00 0B 02 03 00
    02 00 02 08 06 00 00 01 00 00 00 00 09 08 03 00
    02 00 03 08 20 00 00 20 00 00 FF DF FF FF CC 89
    26 A0 43 4A 4B 54 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 66 0F 03 00
    Erase
    02 00 05 08 02 00 00 00 07 08 03 00
    02 00 06 08 06 00 01 00 00 00 A0 00 AD 08 03 00
    Hopefully the main flash was erased, wait for the next step...
    ===================

    I've executed bbupdater -v after that hoping for it to fail, but sadly it reported back the new 4.2.13
    I guess the ieraser doesn't work properly with 4.2.13
    Last edited by Boiling Ice; 11-13-2007 at 07:43 PM.



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    Got the same problem.....

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    it's not even the right secpack for the new baseband (i think), it will definitely not work.... i tried it also baseband won't change.... until now there's no solution on downgrading baseband for 1.1.2 firmware..... (is it?)

    doing ieraser using the old secpack (secpack40113.bin) for modem version 4.02.13, did we make the baseband corrupt?

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    Hey Guys,

    Use the secpack in this file (http://tinyurl.com/2aub6u) with ieraser. It's the 1.1.2 secpack.

    After the bb downgrade process, you should be down to 1.0.2 BB and Secpak - You should then be able to restore to 1.0.2...

    Hope this helps!

    L.

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    Senior Professional Array Boiling Ice's Avatar

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    I've googled around and found this secpack link for the new base band
    the secpack link is here: http://hackmakemod.com/iphone/secpack40213.bin

    I've replaced it with the secpack I had before and run ieraser and it erased it successfully. and I've just downgraded my base band fully

    many thanks virtue for your help

    *** Credit goes to the uploader of the link above... I don't take any credit or what ever for this ***
    Last edited by Boiling Ice; 11-13-2007 at 09:03 PM.


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    i followed this guide and it works perfect:
    http://www.hackint0sh.org/forum/showthread.php?t=15777

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    thx for the secpack it's working i have my 1.1.1 back

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    Thanks Boiling Ice, this worked for one of the iphones i was unlocking.
    Total iPhones unlocked ---- 45 and counting....

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    Senior Professional Array duwde's Avatar

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    Will this work with OTB 1.1.2 USA ? (bootloader 4.6) ??

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    Senior Professional Array Boiling Ice's Avatar

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    sorry mate, I don't know... all of my test was on 2 iPhones upgraded from 1.1.1 to 1.1.2...


 

 
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