Database Info

[Guide] [HowTo] Downgrade 4.4.2 to 4.2.2 [i9500]

Downloads :
XFE-I9500XXUBMH1
Recommended :
make EFS backup
instructions :
1- open odin
2- flash XFE-I9500XXUBMH1 via odin
after you finish, system will show custom, but you need just to flash another 4.2.2 firmware >> download
if you wipe cache and the phone reboots
just flash custom recovery then wipe cahce & data, elc...
then flash stock

can any one test this??? If OP find way to downgrade firmware in 9500 meybe we find way do to downgrade in 9505.
But one question to OP. Do you modded this firmware??? Do you have old Bootloader???

I have a guide on how to downgrade i9505, but the thread closed because I gave a link to mobile odin
And I can confirm that method works 100% for i9505, the same goes to the i9500
I didnt mod this, its just stock but it have like a special bootloader thing
And no I dont have an old bootloader

RubbaBand said:
I have a guide on how to downgrade i9505, but the thread closed because I gave a link to mobile odin
And I can confirm that method works 100% for i9505, the same goes to the i9500
I didnt mod this, its just stock but it have like a special bootloader thing
And no I dont have an old bootloader
Click to expand...
Click to collapse
I have New Boot loader and new modem on kitkat will this affect my downgrade by any way!!!

No it wont effect!
And if you are afraid of any future problems do a backup

but nevertheless you trip knox ?

Ya you will trip knox

ummmmmm i already trip my knox
after downgrading is any way to reset my knox back

Till now there is no way to reset knox

with this method, I could unlock my phone as is referred to in this guide? http://forum.xda-developers.com/showthread.php?t=2282683
im on KK with galaxy s4 i9500

So you want to downgrade then you want to unlock your phone?

Downgrade with firmware XFE-I9500XXUBMH1 work because of one thing
IT DOES NOT HAVE SBOOT.IMG (the bootloader)
it's not a real downgrade because the bootloader is still in 4.3 or 4.4 with KNOX !

Thanks !

Does it apply to I9505 ? If so, how and what do i need?

intika said:
Downgrade with firmware XFE-I9500XXUBMH1 work because of one thing
IT DOES NOT HAVE SBOOT.IMG (the bootloader)
it's not a real downgrade because the bootloader is still in 4.3 or 4.4 with KNOX !
Click to expand...
Click to collapse
But if you do OTA it will erase bootloader so knox is 0 ? i am wrong ?

p220fhf said:
Does it apply to I9505 ? If so, how and what do i need?
Click to expand...
Click to collapse
Just grab an stock firmware from samfirmware and remove sboot.img from it
then flash and it will downgrade.
androidrouen said:
But if you do OTA it will erase bootloader so knox is 0 ? i am wrong ?
Click to expand...
Click to collapse
in any stock rom you have the kernel (boot.img) and the bootloader (sboot.img)
if your phone have a knox bootloader, then you could only flash a knox bootloader (the version does not meter for the moment)
for exemple you could downgrade to stock 4.3 without any modification or removing sboot because v4.3 have a bootloader with knox this is the only way to downgrade the bootloader it's with an other knox bootloader
about erasing knox value this is impossible without sophisticated way like Jtag or replacing the motherboard

intika said:
Just grab an stock firmware from samfirmware and remove sboot.img from it
then flash and it will downgrade.
in any stock rom you have the kernel (boot.img) and the bootloader (sboot.img)
if your phone have a knox bootloader, then you could only flash a knox bootloader (the version does not meter for the moment)
for exemple you could downgrade to stock 4.3 without any modification or removing sboot because v4.3 have a bootloader with knox this is the only way to downgrade the bootloader it's with an other knox bootloader
about erasing knox value this is impossible without sophisticated way like Jtag or replacing the motherboard
if you play with stock firmware your knox value will not change even if you downgrade the sboot.img or remove it from an other stock rom
when i talk about stock i mean samsung release not release made by xda members.
Click to expand...
Click to collapse
I readed a thread where they did : 1) flash 4.1 on kit kat, 2) OTA to be on 4.2. so they totally deleted knox because bootloader of 4.2 does not contain knox ? so if after you upgrade to 4.3 knox should be 0 ? no ? i reade it but i didn't care about that because knox is not a problem for me ^^

androidrouen said:
I readed a thread where they did : 1) flash 4.1 on kit kat, 2) OTA to be on 4.2. so they totally deleted knox because bootloader of 4.2 does not contain knox ? so if after you upgrade to 4.3 knox should be 0 ? no ? i reade it but i didn't care about that because knox is not a problem for me ^^
Click to expand...
Click to collapse
knox value change only if you flash something that are not signed by samsung.
as i say if you play with stock samsung firmware knox value will not change
for the S4 knox was introduced in v4.3
can you please link the thread you talk about

intika said:
knox value change only if you flash something that are not signed by samsung.
as i say if you play with stock samsung firmware knox value will not change
for the S4 knox was introduced in v4.3
can you please link the thread you talk about
Click to expand...
Click to collapse
sorry i didn't found it, but on xda the thread exist, i readed it, coming back to an old bootloader is possible,
i founded this crap link : http://mobiletechvideos.mybigcommerce.com/samsung-galaxy-note-2-bootloader-sboot-downgrade-service/
But if you are interesed search about
1) flash via odin rom 4.1 without bootloader (your status should be official)
2) OTA to 4.2 and magic knox is totally erased
3)OTA to 4.3 kitakat ect and knox is 0

Edit : Knox value change if you downgrade to any sboot.img
---------- Post added at 04:56 AM ---------- Previous post was at 04:56 AM ----------
androidrouen said:
sorry i didn't found it, but on xda the thread exist, i readed it, coming back to an old bootloader is possible,
i founded this crap link : http://mobiletechvideos.mybigcommerce.com/samsung-galaxy-note-2-bootloader-sboot-downgrade-service/
But if you are interesed search about
1) flash via odin rom 4.1 without bootloader (your status should be official)
2) OTA to 4.2 and magic knox is totally erased
3)OTA to 4.3 kitakat ect and knox is 0
Click to expand...
Click to collapse
http://forum.gsmhosting.com/vbb/f672/regarding-knox-s4-1775213/

[Q] Does Unroot require flashing of stock ROM

Hi,
I Rooted my Sprint GS5 the other day so that I could use Tasker to kill apps. I didn't flash a new ROM. I was reading about UnRooting, and all of the walkthroughs talk about flashing the stock ROM. If I havent flashed a new ROM since I rooted, if I were to unroot, is it a requirement to flash the stock ROM?

Most likely, yes. You would have to flash back. On my SGS4 mini I used a tool that had an UnRoot option.
Sent from my Galaxy S5 G900P running R.D.D.T Mystery Build v1.1 using Mystery Build Stock Kernal

tdischino said:
Hi,
I Rooted my Sprint GS5 the other day so that I could use Tasker to kill apps. I didn't flash a new ROM. I was reading about UnRooting, and all of the walkthroughs talk about flashing the stock ROM. If I havent flashed a new ROM since I rooted, if I were to unroot, is it a requirement to flash the stock ROM?
Click to expand...
Click to collapse
I don't see why you'd have to flash a stock rom as you're already on it. What's the reason you wan't to unroot? You've already tripped the knox counter and there's no going back from that. :crying:

Ramer84015 said:
I don't see why you'd have to flash a stock rom as you're already on it. What's the reason you wan't to unroot? You've already tripped the knox counter and there's no going back from that. :crying:
Click to expand...
Click to collapse
Since the user documented processes specify it, i wasn't sure if it was safe to just ignore the step.
Regarding the knox count, does that just affect warranty, or will that also affect ability to receive OTA updates? I was looking to unroot because I was expecting the 4.4.3 OTA update any day.
thanks!

tdischino said:
Since the user documented processes specify it, i wasn't sure if it was safe to just ignore the step.
Regarding the knox count, does that just affect warranty, or will that also affect ability to receive OTA updates? I was looking to unroot because I was expecting the 4.4.3 OTA update any day.
thanks!
Click to expand...
Click to collapse
I'm not 100% sure, but I think that what effects an OTA update is whether you installed a custom recovery such as TWRP or CWM.

[GUIDE] Root and Unlock Canadian i337M without tripping Knox

Tested on my Canadian i337M S4 (4.4.2 MVLUFNI2 firmware). Knox was not tripped.
This may work on other S4.
Summary of the Steps:
- Downgrade to special Kernel from W0lfdroid
- Root with TowelRoot
- Flash back 4.4.2 Kernel
- Downgrade to 4.2.2 Modem
- Unlock with RegionLock Away v1.3
- Flash back 4.4.2 Modem
Detailed Steps:
-=FILES REQUIRERD=-
Download these ROMs from SamMobile:
4.2.2 rom for your phone
- Use 7zip to extract MODEM.BIN from it
4.4.2 rom for your phone
- Use 7zip to extract MODEM.BIN from it
- Also use 7zip to extract BOOT.IMG (this is the Kernel), and archive it as a tar file.
-=ROOT=-
Follow this method:
http://www.w0lfdroid.com/2014/09/To...4-S5-and-Note3-Android-4.4.2-NF-or-Later.html
Important: for flashing back the Kernel, the 4.4.2 file from that site may not work properly (causes wifi to behave weird). You need to use the boot.img tar you made earlier.
-=UNLOCK=-
1. Put S4 into download mode by holding Volume Down and Home Button on startup, then press Volume Up
2. Attach Phone using USB cable
3. Start Odin
4. under the Files [Download] section 3rd button (Phone) point to the 4.2.2 modem.bin
5. click on start
6. --- After phone reboots, check it installed correctly by verifying the baseband version is the same as the one you just flashed
7. Once successful run RegionLockAway
8. Next you must install proper modem back using Odin
9. Start Odin
10. under the Files [Download] section 3rd button (Phone) point to the 4.4.2 modem.bin
11. click on start
12. --- After phone reboots, check it installed correctly by verifying the baseband is the same as the one you just flashed

Using Heimdall on Linux to flash stock ROM and getting everything back to original tripped KNOX for me.
Everything was done properly and ROM worked perfect. Oh well.
Tip: (lol)
When flashing stock firmware back to device stick to Windows stock ROM flashing methods. (Odin)
Wish I would of found this info a few weeks ago. niCCe!

ngold thanks
I have a phone from a guy at work it is a Rogers phone KNOX is already tripped the phone is rooted and on 4.4.2 MVLUFNI2 firmware can I still use your unlock method?
And if so which 4.2.2 firmware did you use on Sammobile I don't see any Canadian firmware listed for 4.2.2.
Do you have a link to the RegionLockAway is it just the 1.3 version I'm finding for the Note 3?

stdly said:
ngold thanks
I have a phone from a guy at work it is a Rogers phone KNOX is already tripped the phone is rooted and on 4.4.2 MVLUFNI2 firmware can I still use your unlock method?
And if so which 4.2.2 firmware did you use on Sammobile I don't see any Canadian firmware listed for 4.2.2.
Do you have a link to the RegionLockAway is it just the 1.3 version I'm finding for the Note 3?
Click to expand...
Click to collapse
Yeah you can use this method if KNOX is already tripped. (or you can just use CF-Autoroot as it saves some hassle)
To unlock, the firmware I used was VLUAMDJ . On Sammobile, you'll see it if you filter by Canada (Rogers).
For Regionlock Away 1.3, yes you can use the one posted in the Note 3 forum - http://forum.xda-developers.com/showthread.php?t=2470551

ngold said:
Yeah you can use this method if KNOX is already tripped. (or you can just use CF-Autoroot as it saves some hassle)
Click to expand...
Click to collapse
Thanks ngold,
Will CF-Autoroot unlock the phone it is already rooted?

stdly said:
Thanks ngold,
Will CF-Autoroot unlock the phone it is already rooted?
Click to expand...
Click to collapse
No CF-Autoroot only roots the phone. It trips the Knox, but it's easier. So if you already tripped Knox, that's the best method to root.

ngold said:
No CF-Autoroot only roots the phone. It trips the Knox, but it's easier. So if you already tripped Knox, that's the best method to root.
Click to expand...
Click to collapse
Thanks dude it worked I was worried because I didn't have a working sim card in it but no problems.

I can't flash the modem, bootloader locked?

download what roms? links?

If the phone has a 4.3 or newer bootloader, the phone can't be rooted without tripping knox as far as I know.

Do you still get OTA if you flash stock FW via Odin?

If my phone have the let`s say swedish stock ROM and I update to Polish stock ROM that is a later build date via Odin... do I still get OTA`s for my phone or how does it work?! no knox tripped and all stock, just flashed another stock ROM via odin.

Hi! No tripped knox with odin: flash with stock rom and you keep ota ! Knox is tripped with flashing ,custom recovery or custom kernel auto cfroot.

darksimo said:
Hi! No tripped knox with odin: flash with stock rom and you keep ota ! Knox is tripped with flashing ,custom recovery or custom kernel auto cfroot.
Click to expand...
Click to collapse
ahh ok thanx! so it is only when Knox is tripped the OTA stops? will I still get the OTA like the swedesh one (kind of late sometimes) or will I get it with the Polish one?

As long as you are stock with no root and stock recovery OTA works - doesn't matter about knox.
I was rooted (with Knox tripped) but flashed the stock Vodafone over the top to get rid of root a twrp and the ota worked fine.
Sent from my SM-G920F using XDA Free mobile app

If I remember correctly when I read the s4 forums a while back you will receive the OTAs for the firmware you downloaded (so you'll get Polish OTA and not the Swedish ones) but I'm not completely sure on that.

Can i root s7 snapdragon without triggering knox?

Im planing on selling my phone in 6 months but the company i want to sell it too does not accept rooted phones. Is there anyway to root and flash standard ROM back without triggering knox?
thanks

Just flash stock ROM onto device via Odin

PureEnergyy said:
Just flash stock ROM onto device via Odin
Click to expand...
Click to collapse
So after rooting and putting a custom ROM on i can just put my stock ROM back on and thats not going to trigger knox??

If you've installed a custom ROM, I'm fairly sure that should've tripped the knox anyway (Correct me if I'm wrong), but if it didn't flashing stock Rom isn't going to trip it

lumix4321 said:
So after rooting and putting a custom ROM on i can just put my stock ROM back on and thats not going to trigger knox??
Click to expand...
Click to collapse
Custom ROMs don't exist for the S7 US version.

Once tripped, tripped it is.
You talk about a custom ROM. Remember that you need to flash a custom recovery to flash a custom ROM.
Once you flash it, Knox becomes 0x1, tripped for good.
Even if you reflash your device with an official firmware, that will not hide the tripped Knox.
Samsung will always see that it was tampered with.
What you can do is hide root from specific apps, while using a rooted divece, but that's another story.
No one can revert Knox from 0x1 back to 0x0, at least not with any software.