[Q] is it safe to downgrade from lollipop to katkat? - Galaxy S 5 Q&A, Help & Troubleshooting

hi guys!
i am having samsung s5 g900h, i updated it to lollipop few months back n now i want to downgrade it to kitkat(too much battery drain issue), so i want to know is it safe to downgrade? any problems after downgrading? and what about knox it is 0x0 now will it get affected?
please give me procedure for downgrading and method to root it on kitkat (towelroot will work on kk?)

you should be fine, I updated to lollipop then downgraded back to kitkat easily, you just need to find the file you need for your model and odin that and it should work, for the knox, im not sure about it, but there might be a chance it will be reverted back to 0x0, but you will need to wipe your data in the recovery, or it might not boot at all, and for downgrade/root i use skipsoft android toolbox, it has all the items you would need to downgrade or install root if you want.

Related

fastest way from stock non rooted i9301i 4.4.2 to cm11

Sammobile dont have old 4.3 rom. And if they even had it, I am not sure would I brick it by downgrading. Can somebody just say easiest way of rooting and installing latest cwm possibly without tripping knox.
Thanks in advance, damn online update kk did not even ask for permission to upgrade.

[Q] Root 5.0 without setting of knox

Hi.
Question, is there a way to root 5.0 (stock) without tripping knox?
Tried to search\google it, nothing came up.
It's very important to me not to set off knox I still have warranty.
please help :fingers-crossed:
Device model SM-G900F
Nope not really
There was some info about downgrading to KK and rooting with towelroot, then using Mobile ODIN Pro to inject root into a stock Lollipop ROM and upgrade that way, never got that working myself though
No way to directly root stock Android 5 on the Galaxy s5 without tripping knox. However, you can downgrade to a stock 4.4. ROM and then use Towelroot. Afterwards you flash Alexandr's prerooted Lollipop ROM. There are guides everywhere, you could use this one for example https://www.reddit.com/r/galaxys5/comments/2ubsbs/guide_rooted_android_50_for_the_international/
icu___ said:
No way to directly root stock Android 5 on the Galaxy s5 without tripping knox. However, you can downgrade to a stock 4.4. ROM and then use Towelroot. Afterwards you flash Alexandr's prerooted Lollipop ROM. There are guides everywhere, you could use this one for example https://www.reddit.com/r/galaxys5/comments/2ubsbs/guide_rooted_android_50_for_the_international/
Click to expand...
Click to collapse
Thanks!
Can I just downgrade to 4.4, root it and leave it like that without upgrade it back to 5.0?
Yes, you can. No one is forcing you to use Lollipop. I find this thread very useful: http://forum.xda-developers.com/galaxy-s5/general/how-to-root-triggering-knox-2nd-method-t2843044
If you just want to use towelroot on 4.4. follow the root instructions and do not flash the Lollipop firmware afterwards.

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!

Installing custom roms onto untouched I9505 (5.0.1, I9505XXUHOE4 KNOX 2.3)

Hi,
I'm new to the custom roms and would like to see advice on the recommended method to install a custom rom onto my untouched I9505. It's currently running Lollipop 5.0.1, I9505XXUHOE4 with KNOX 2.3
Thank you
This would belong into the Q&A section.
Anyway, the first thing you will need to do is to install a custom recovery. I recommed TWRP.
Just google twrp s4.
Optional: if you want to backup any apps or data, you will have to root first. Use odin and cf auto root.
After you installed a custom recovery, just look for a rom that interests you and flash it. Every rom has flash instructions.
Also check to make sure your phone doesn't have a locked bootloader. If it does, things are going to get complicated. If it doesn't, then you're good to go. AT&T and Verizon lock the bootloaders.
Thanks for info GDReaper.
My concern here is KNOX. Will the new bootloader affect anything on the custom roms as compared to a pre KNOX bootloader. Do I need to downgrade the firmware first?
Thanks
Hi @elus,
Installing any custom firmware will trip Knox. You can't downgrade it to pre-Knox bootloader.
Sent from my GT-I9500
Knox will not affect anything. Flashing custom firmware will only trip knox. This means that you lose your warranty. But the warranty is crap anyway, so it doesn't matter.
You won't see any trace of knox in custom roms. You might as well forget you ever had something called knox.
An easy way to root the ROM with TWRP is to flash supersu.zip from TWRP. Upon first boot, open supersu and let it disable knox and update binary files if necessary. You should be fine from that point forward.
Great! Thanks guys for the guide. Let the custom rom mods begin! Happy New Year Everybody!

[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.
Click to expand...
Click to collapse
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.

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