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[Q] [I9505] Custom rom on KN0X tripped phone?

Hey all, I'd like to install this rom, but my phone (S4 international GT-i9505) is KN0X tripped on 4.3. I currently run 4.3 stock. Is it safe to install this rom, and is it possible to downgrade back to 4.3 stock after?

screen said:
Hey all, I'd like to install this rom, but my phone (S4 international GT-i9505) is KN0X tripped on 4.3. I currently run 4.3 stock. Is it safe to install this rom, and is it possible to downgrade back to 4.3 stock after?
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Yup you can flash any custom rom via custom recovery and Yes you can still downgrade your phone into 4.3 stock rom but remember not to flash a Stock 4.4.2 Kitkat firmware because flashing 4.4.2 firmware can no longer downgrade to 4.3 stock rom. Flashing any custom rom/root will trigger your knox and If you wanna know more about knox , check this thread Have a nice day.

[Q] Need to update?

Hi, i have an s4 and i am still on the 4.3 bootloader. I never officially flashed 4.4.2 tw. I can flash all 4.4.2 roms just fine everything works. So my question is..should i update it? Should i not? What are the downsides and upsides. Also i believe my knox is already tripped and my warranty is gone because i hastily updated to 4.3 from 4.2.2 so yeah if knox is out of the question is there any harm in updating my whole phone to 4.4.2 bootloader/modem etc

[Q] I9505 4.3 BL with 4.4.2 Rom possible ?

Is it possible to have a 4.3 bootloader but run a 4.4.2 rom (without BL) on a I9505 ?
Only ask as I don't want to update system and get stuck in 4.4.2 with no way of going back should I have issues (battery etc).
Ideally would like something stock or near stock deodexed
Cheers

Azriaphale said:
Is it possible to have a 4.3 bootloader but run a 4.4.2 rom (without BL) on a I9505 ?
Only ask as I don't want to update system and get stuck in 4.4.2 with no way of going back should I have issues (battery etc).
Ideally would like something stock or near stock deodexed
Cheers
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Click to collapse
Hi ,
Yes that is possible , of course we are talking about a CUSTOM 4.4.2 rom
There are options available to fit your needs in the I9505 Android development section

jfltecan: Is that really impossible to downgrade from KK to JB? Can someone confirm?

Hi,
I have experience with the Canadian S4 I337M, currently running custom Validus ROM 5.1.1, originally was on TouchWiz 4.4.2;
I have altough a question that seems quite.. debated, did looked around I can't find a definitive answer and know who I should trust. I wonder if options changed in 2015 rather than 2013 when KNOX was still new.
Out of simple curiosity (I will not attempt it, risky, probably useless and I'm running 5.1.1 anyway): I keep reading that it's impossible to downgrade the S4 to 4.2.2, due to the KNOX bootloader on 4.3 / 4.4, I understand that you cannot downgrade below 4.3 which is the "new" KNOX bootloader.
1. I'm simply curious: On the I337M, what happens if you grab the stock 4.2.2 firmware and flash it with Odin anyway, considering I'm on 4.4 ? My guess, if I'm correct, Odin detect the bootloader version right away and says "FAIL". Correct?
2. I used to think it was possible to downgrade from 4.4 to 4.3, since 4.3 has the KNOX bootloader as well. Is this possible anyway, or will Odin fail (Not going to try it, not worth it)? Considering what I've read just today, 4.4 is also a new bootloader. In any case, since that 4.4 bootloader cannot be downgraded (I guess?), there is no way to downgrade from 4.4 to stock 4.3 either? Odin will show "FAIL" ?
3. Is there any other way to downgrade it anyway? I understand that KNOX 0x1 remain irreversible yet, and to my knowledge, it's impossible to dowgrade to 4.2.2 (Or even 4.3?), but I've been reading that it was possible to downgrade if the bootloader is excluded from the TAR archive, make sense to me, but is that true, was that patched? Should I recompile an ODIN package excluding the bootloader, is that how it's done (Too dangerous, not trying it)? Or maybe by using Mobile Odin / FlashFire, downgrading from 4.4 to 4.3 / 4.2 can be acheived, if the bootloader is left untouched? What happens if we try it anyways? Odin fail, or device does boot but doesn't get past Samsung boot logo?
I'm just wondering, and quite confused by the different opinions that were shared. Remember this is for the Canadian I337M variant.
Thanks for confirming, appreciate!

[I9500] Downgrade 6.0.1 to 4.4.2

Hello all, quick question
I have an S4 I9500 running GearCM13 (6.0.1) and I want to go back to stock 4.4.2, would following this guide do the trick or is it no longer possible to downgrade?
If this has already been discussed, a link is appreciated as I've searched and found nothing conclusive.
Thanks

It depends on your bootloader. If you never upgraded the bootloader from 4.4.2 you should be able to go back to stock rather easily. You may be able to go back even with an upgraded bootloader, since both the 5.0.1 bootloader and 4.4.2 bootloaders have Knox. You'll just have to try the guide.

Strephon Alkhalikoi said:
It depends on your bootloader. If you never upgraded the bootloader from 4.4.2 you should be able to go back to stock rather easily. You may be able to go back even with an upgraded bootloader, since both the 5.0.1 bootloader and 4.4.2 bootloaders have Knox. You'll just have to try the guide.
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Thanks, that's the info I needed.
To summarize the whole situation which led me to want to downgrade: I was on GEARCM13 and battery drain was too much to handle so I wanted to go back to a KK 4.4.2 rom (Ozcan) but then I read about Infernus Rom (Based 5.1.1 Ale95 Note Port) and went that way. Strephon's info helped me notice I didnt have to downgrade anything since I have a 5.0.1 bootloader.
Kinda convoluted response, if anyone wants further details, please pm.