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Discuss GUIDE to Downgrade 1.1.2 Baseband (04.02.13_G) to 1.0.2 (03.14.08_G) at the iPhone "2G" (Rev. 1) - Hackint0sh.org; I am writing this because I thought people should know. What I did was, I ...
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    Default GUIDE to Downgrade 1.1.2 Baseband (04.02.13_G) to 1.0.2 (03.14.08_G)

    I am writing this because I thought people should know. What I did was, I had an unlocked 1.0.2 in Australia. Then, I decided to update to 1.1.1. So, I followed the instructions from Hackint0sh on this thread :

    http://hackint0sh.org/forum/showthread.php?t=13561

    Everything went smoothly but I did one thing wrong. I wanted to activate Youtube and I mistakenly replaced the youtube fix files (the unholy 3 files) on my iPhone. That rendered my 1.1.1 iPhone unactivated, locked and Emergency calls only eventhough I had network signal and also receives SMS. Weird right? Yes. Anyways... I restored back to 1.0.2 from 1.1.1 but first had to restore to 1.1.2. Which means, I had 04.02.13_G modem firmware.

    This guide is for 1.0.2 with baseband 04.02.13_G because you have updated to 1.1.2 and decided to go back to 1.0.2.

    You need these 112fr files.
    I assume you already have WinSCP and PuTTY, anySIM102.

    You'll also have to install the BSD Subsystem, SSH, and the Community Sources from Installer.

    Guides were written here and here first. So, I am just updating some things.

    Assuming that you've taken care of the afformentioned prerequisites you're ready to continue.

    Now, the secpack included in the 112fr files is the 04.02.13_G baseband secpack. So, any other secpack you find which is not for the 04.02.13_G baseband will NOT work.

    Step 1: Using WinSCP, connect to your iPhone (root:dottie) and upload:

    ICE03.14.08_G.eep
    ICE03.14.08_G.fls
    iEraser
    bbupdater
    secpack

    to /usr/bin on your iPhone.

    Upload AnySIM.app to /Applications. Make sure you chmod it to 0755 by going to Properties of every file in your iPhone in the app and change it, obviously.

    Turn your phone off and back on. If you see AnySIM on your home screen proceed to the next step.

    Step 2: Using PuTTY, connect to your iphone (again using root:dottie). Run the following command:

    launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist

    If it says no such process, then the CommCenter has not been loaded. You can proceed to next step.

    Now type in:

    cd /usr/bin

    chmod +x ieraser

    chmod +x bbupdater

    ieraser

    bbupdater -v

    At this point bbupdater will return saying that it could not ping the baseband. This is good and means it was successfully deleted.

    Step 3: Overwrite with the new baseband by typing in the following:

    bbupdater -f *.fls -e *.eep

    It will run its course. When finished type in:

    bbupdater -v

    It should tell you that you have modem version 03.14.08_G. The hard part is done.

    Step 4: Go to Settings | General | Auto-Lock | Set it to Never. Then run AnySIM from your homescreen. It will run its course and you will now have the proper IMEI and be able to use any SIM that you want with your phone.



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    does it work on brand new 1.1.2 iphones with 1.1.2 and 04.02.13_G baseband ??

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    Rookie Array evangel's Avatar

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    1.1.2 cannot be unlocked with anySIM as of yet, so, even if you downgrade your baseband, you are still sim locked.

    Best way is to restore to 1.0.2, then do this guide.

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    nice simple guide.. i like guides like this.

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    but if I downgrade to 1.0.2 from a 1.1.2, will I be able tu unlock it?


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    I wasw ondering: do you think I can downgrade to 1.1.1 instead? thanks

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    Here, I formatted this document slightly.

    http://docs.google.com/Doc?id=dgzw9xs_4ft5qj3

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    Hi

    I upgraded my 1.1.1 to 1.1.2 and did everything until the pint of activation... at which I realized I couldn't unlock the phone with iTunes.

    I then restored 1.1.1 and followed the procedure until I used AnySIM 1.1 which threw an error in the end.

    Now I have a jailbreaked 1.1.1 iphone but I can't unlock the SIM card.

    In the version info, I can see I have a 1.1.2 baseband... do you think I can use your methord to go back to 1.0.2, then restore the 1.0.2 firmware and take it from there?

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    Quote Originally Posted by piottone View Post
    but if I downgrade to 1.0.2 from a 1.1.2, will I be able tu unlock it?
    Yes. the main thing here is the baseband version. You have to make sure the baseband / modem firmware is downgraded.

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    Quote Originally Posted by evangel View Post
    Anyways... I restored back to 1.0.2 from 1.1.1 but first had to restore to 1.1.2. Which means, I had 04.02.13_G modem firmware.
    Quick question, why do you "first" have to restore to 1.1.2 ??.
    You can go from 1.1.1 back to 1.0.2 without the 1.1.2 stuff.


 

 
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