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Downgrade from 4.3 back to 4.1.2

OP zephr5

12th December 2013, 10:20 AM   |  #1  
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So I did this a couple times now first by accident, then on purpose. If you want to go back to 4.1.2 from 4.3 all you have to do is use Odin. Flash stock 4.1.2 onto 4.3 you get an error "unsupported firmware" then put your phone back into download mode (volume down+home button+power) next flash CF-auto root. After that you can boot into recovery (volume up+home+power) in recovery format everything factory reset, format cache. Last reboot your phone it should reboot into 4.1.2 I think that is how I did it if I remember all the steps right. Feel free to ask questions I don't always explain myself very well.

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12th December 2013, 11:01 AM   |  #2  
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So, has the 4.3 bootloader (which has KNOX) been downgraded to 4.1.2? And KNOX is removed?
What is the status of your device right now in Download Mode?
12th December 2013, 01:16 PM   |  #3  
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Quote:
Originally Posted by jk0l

So, has the 4.3 bootloader (which has KNOX) been downgraded to 4.1.2? And KNOX is removed?
What is the status of your device right now in Download Mode?

More importantly, if it has the non-Knox download mode (without the whole 0x1 tidbit), does reinstalling the OTA (which would have the Knox download mode) show 0x1 or 0x1 ??

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12th December 2013, 01:47 PM   |  #4  
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Quote:
Originally Posted by PhxDroid86

More importantly, if it has the non-Knox download mode (without the whole 0x1 tidbit), does reinstalling the OTA (which would have the Knox download mode) show 0x1 or 0x1 ??

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the million dollar question.
12th December 2013, 02:41 PM   |  #5  
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Well to be honest I think the answer to both questions is No. In download mode after I did the ota knox bull has been there. I actually only meant to use auto root on my 4.3 but knox kept on screwing up the root and su would fc. I figured if I started over and used auto root on 4.3 right after flashing rom with odin without letting phone boot and that worked I have 4.3 rooted with su and custom recovery (cwm). So no I didn't find a way to get rid of knox completely. Just a way to go back to 4.1.2 from 4.3.

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12th December 2013, 03:21 PM   |  #6  
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Quote:
Originally Posted by zephr5

Well to be honest I think the answer to both questions is No. In download mode after I did the ota knox bull has been there. I actually only meant to use auto root on my 4.3 but knox kept on screwing up the root and su would fc. I figured if I started over and used auto root on 4.3 right after flashing rom with odin without letting phone boot and that worked I have 4.3 rooted with su and custom recovery (cwm). So no I didn't find a way to get rid of knox completely. Just a way to go back to 4.1.2 from 4.3.

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You need to update supersu when rooting on 4.3. Otherwise it will forceclose.

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12th December 2013, 10:44 PM   |  #7  
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I'm still thinking that Knox will need to be patched/disabled during the root process (or something along those lines). Samsung claims the the fuse trigger is only capable of being triggered from 0x0 to 0x1 and not back again. So to me the answersolution probably will have to come with segregating Knox from the bootloader/system altogether. It'd be funny if devs could use Knox against itself by segregating it in the very "sandbox" it creates, if that makes sense

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15th December 2013, 11:25 PM   |  #8  
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Any 4.1.2 stock tar or was it a specific one? also is there only one version of CF auto root?
16th December 2013, 12:10 AM   |  #9  
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Help please!
Hello All.. After over 5 years of flashing I think I have finally bricked my device.. I am normally great with directions and the forum however I think the latest 4.3 update got me twisted up. Odin'd back to stock and upgraded OTA. All was well.. Then I attempted Chainfire's CF auto root.. All was well and I froze on a phone call.. I battery pulled and now I get "Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again".. I tried to go through Kies emergency recovery and it wont accept my serial numbers.. I called t-mobile they told me I need to bring it to a smasung dealer to get "flashed"... I'm at a lost now.. One thing else is when I access download mode I see this Knox Warranty Void : 1.. Does this mean I'm done? I've been trying to read up on this knox and it seems scary to say the least.. yet nothing I read has helped me.. After hors of searching and missing the football game I decided to look to the forums.. Any help is very much appreciated.

I tried to ODIN back to stock with several .tar files (UVBMB4 and UVALJ1) it fails and shows unsupported version(in red) on the device

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16th December 2013, 12:14 AM   |  #10  
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Quote:
Originally Posted by cr1130

Hello All.. After over 5 years of flashing I think I have finally bricked my device.. I am normally great with directions and the forum however I think the latest 4.3 update got me twisted up. Odin'd back to stock and upgraded OTA. All was well.. Then I attempted Chainfire's CF auto root.. All was well and I froze on a phone call.. I battery pulled and now I get "Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again".. I tried to go through Kies emergency recovery and it wont accept my serial numbers.. I called t-mobile they told me I need to bring it to a smasung dealer to get "flashed"... I'm at a lost now.. One thing else is when I access download mode I see this Knox Warranty Void : 1.. Does this mean I'm done? I've been trying to read up on this knox and it seems scary to say the least.. yet nothing I read has helped me.. After hors of searching and missing the football game I decided to look to the forums.. Any help is very much appreciated.

I tried to ODIN back to stock with several .tar files (UVBMB4 and UVALJ1) it fails and shows unsupported version(in red) on the device

Device-T-Mobile Galaxy Note 2

Odin the official 4.3 update. That should fix you up

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