Downgrade I9500 - Galaxy S 4 Q&A, Help & Troubleshooting

i just gave a thought to downgrade process.
i want yo ask the devs that can we downgrade s4 from 4.4.2 to 4.3 after changing the boot.img as i think flashing a boot.img will change the bootloader. moreover i was thinking to exctract a 4.3 firmware's boot.img n flash it.
will it hrlp ? will it work ?
i font care for warranty boid.i just need 4.3 back.

ronak.chawla30 said:
i just gave a thought to downgrade process.
i want yo ask the devs that can we downgrade s4 from 4.4.2 to 4.3 after changing the boot.img as i think flashing a boot.img will change the bootloader. moreover i was thinking to exctract a 4.3 firmware's boot.img n flash it.
will it hrlp ? will it work ?
i font care for warranty boid.i just need 4.3 back.
Click to expand...
Click to collapse
You can no longer downgrade your phone to 4.3 after flashing 4.4.2 firmware from Samsung mate but you can still downgrade your phone by flashing a custom 4.3 rom

ronak.chawla30 said:
i just gave a thought to downgrade process.
i want yo ask the devs that can we downgrade s4 from 4.4.2 to 4.3 after changing the boot.img as i think flashing a boot.img will change the bootloader. moreover i was thinking to exctract a 4.3 firmware's boot.img n flash it.
will it hrlp ? will it work ?
i font care for warranty boid.i just need 4.3 back.
Click to expand...
Click to collapse
Are you on a 4.4.2 stock or custom ROM? The safest way to go seems to be flashing any 4.3 custom ROM via Odin or custom recovery.

Related

[Q] manually install 4.3.3 via odin

hey guys my i9500 is rooted on 4.2.2 ,i am currently running arrow rom.i just downloaded 4.3.3 official rom for my phone ,i just wanted to know whter it has to be installed in the same way as before via odin ,viz. selecting it on pda or i need to do anything else tooo.and do i need to make an efs backup also before i flash this rom.
i am a newb so plzz try to be noobfriendly
p.s i couldnt find any other post which could help me so if there is any,can you guys please post the link also
If you are still on 4.2.2, then I would recommend to not upgrade to a 4.3 stock rom. Doing so will flash the new bootloader which will setup Knox on your phone. When you have the new bootloader and you flash a custom rom, Knox wil be set to 0x1. You can read more about Knox in the Knox thread.
If you planning on flashing custom roms in the future, then stay away from official firmwares.
Lennyz1988 said:
If you are still on 4.2.2, then I would recommend to not upgrade to a 4.3 stock rom. Doing so will flash the new bootloader which will setup Knox on your phone. When you have the new bootloader and you flash a custom rom, Knox wil be set to 0x1. You can read more about Knox in the Knox thread.
If you planning on flashing custom roms in the future, then stay away from official firmwares.
Click to expand...
Click to collapse
So is should stay on 4.2.2? What about flashing roms based on 4.3.3?
any significant changes in 4.3.3 that ill be missing?
btw thanks for replying bro.
when did 4.3.3 come out
i would like to know just where is this 4.3.3 coming from ..i know 4.3 is out but have not seen any official 4.3.3 on samsung servers...or google GE edition either ..
Is this a custom rom...
Nexsss1 said:
So is should stay on 4.2.2? What about flashing roms based on 4.3.3?
any significant changes in 4.3.3 that ill be missing?
btw thanks for replying bro.
Click to expand...
Click to collapse
You can flash any custom rom based on 4.3 that you want. Because custom roms don't flash the bootloader. There seem te be some problems with sound and wifi (but i'm not sure) when you flash a custom 4.3 rom on an old bootloader. But you can always revert to a custom 4.2.2 rom. So you can just try it
Just don't flash originial firmwares. Custom roms are safe.
Lennyz1988 said:
You can flash any custom rom based on 4.3 that you want. Because custom roms don't flash the bootloader. There seem te be some problems with sound and wifi (but i'm not sure) when you flash a custom 4.3 rom on an old bootloader. But you can always revert to a custom 4.2.2 rom. So you can just try it
Just don't flash originial firmwares. Custom roms are safe.
Click to expand...
Click to collapse
Thanks for the info bro..i just wanted to know whether I would be missinganything significant If idont updateto 4.3.3 or any 4.3.3 roms, cause of the problems you mentioned
sorry to highjack the thread as its a noob question but wanted to make sure.
I am on MH8 knox 0x0.
If i flash the 4.3 MJ5 stock firmware via know will it trigger knox? i have no intention of rooting just to upgrade to official 4.3?

[Q] Most pure Samsung 4.3 custom rom (old bootloader and no knox)?

I currently have 4.2.2 with the old bootloader on i9505. I would like to keep it Knox free, but would also like
to try a newer rom. Is there a rom that is as close as possible to stock Samsung 4.3 (obviously
without Knox or new bootloader)?
This:
http://forum.xda-developers.com/showthread.php?t=2250824
Use CWM version. Stock rom without KNOX and bootloader. :good:
nikzDHD said:
This:
http://forum.xda-developers.com/showthread.php?t=2250824
Use CWM version. Stock rom without KNOX and bootloader. :good:
Click to expand...
Click to collapse
Which modem would suit the PDA: XXUEML6 version? The same one that came with XXUEML6 in stock? I have heard conflicting reports about different modem versions playing not so nice and its better to match them with what came with stock rom?
I assume also that XXUEML6 WiFi_FIX will need to be flashed via Odin after flashing a modem?
clarification
So do you mean without knox and without bootloader or do you mean or do you mean without knox but with a bootlaoder as it is the older bootloader that i am trying to find for i9505. i understand some forums say you cannot roll back the firmware from 4.4.2 to 4.2. I however am having the screen rotation problem with the new 4.4.2 so i'm trying to find a way and one way might be to install a custom rom with old bootloader via CWM install zip function to replace the new 4.4.2 bootloader. This will then allow me to roll back the firmware to an older version and kill my screen rotation problems.
nikzDHD said:
This:
http://forum.xda-developers.com/showthread.php?t=2250824
Use CWM version. Stock rom without KNOX and bootloader. :good:
Click to expand...
Click to collapse

[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?
Click to expand...
Click to collapse
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] Downgrade from 4.4 to 4.2

Hello, i am currently at 4.2.2 firmware (I9505XXUBMG4) and i have a EFS backup and a nandroid backup. i wish to upgrade my phone to 4.4 but i not sure because maybe if i do not like the 4.4 i will not be able to downgrade to 4.2.
can i go back to 4.2 from 4.4?? i don't care about the warranty or the knox feature
fdlm82 said:
Hello, i am currently at 4.2.2 firmware (I9505XXUBMG4) and i have a EFS backup and a nandroid backup. i wish to upgrade my phone to 4.4 but i not sure because maybe if i do not like the 4.4 i will not be able to downgrade to 4.2.
can i go back to 4.2 from 4.4?? i don't care about the warranty or the knox feature
Click to expand...
Click to collapse
Hi ,
Once you upgrade your bootloader is not possible to go back to 4..2.2 (or 4.3)
You upgrade your bootloader if:
Flash a stock rom 4.3 and higher
you do not upgrade your bootloader if:
root , install custom recovery and flash a custom rom , there are a few good rom based in samsung stock 4.3 and 4.4.2 you can try them see if you like them and if you don't you can always flash stock 4.2.2 and be as you were
Ok, so essensialy i can't downgrade the bootloader to 4.2.
but a official 4.2.2 firmware (without knox) will work on a 4.4 bootloader ??? (again i don't care about knox working or not)
fdlm82 said:
Ok, so essensialy i can't downgrade the bootloader to 4.2.
but a official 4.2.2 firmware (without knox) will work on a 4.4 bootloader ??? (again i don't care about knox working or not)
Click to expand...
Click to collapse
Thats downgrading. So no it wont work.
Lennyz1988 said:
Thats downgrading. So no it wont work.
Click to expand...
Click to collapse
Yes i know is downgrading, that is the main question of this
MAX 404 said:
Hi ,
Once you upgrade your bootloader is not possible to go back to 4..2.2 (or 4.3)
You upgrade your bootloader if:
Flash a stock rom 4.3 and higher
you do not upgrade your bootloader if:
root , install custom recovery and flash a custom rom , there are a few good rom based in samsung stock 4.3 and 4.4.2 you can try them see if you like them and if you don't you can always flash stock 4.2.2 and be as you were
Click to expand...
Click to collapse
Ok, so essensialy i can't downgrade the bootloader to 4.2.
but a official 4.2.2 firmware (without knox) will work on a 4.4 bootloader ??? (again i don't care about knox working or not)
fdlm82 said:
Ok, so essensialy i can't downgrade the bootloader to 4.2.
but a official 4.2.2 firmware (without knox) will work on a 4.4 bootloader ??? (again i don't care about knox working or not)
Click to expand...
Click to collapse
You are asking the same question again. It's not possible.
Lennyz1988 said:
You are asking the same question again. It's not possible.
Click to expand...
Click to collapse
It has been done to 4.3 in this thread: http://forum.xda-developers.com/showthread.php?t=2744061
they have flashed a 4.3 ROM without bootloader over a 4.4 ROM so the result is a 4.3 rom with a 4.4 bootloader
fdlm82 said:
Ok, so essensialy i can't downgrade the bootloader to 4.2.
but a official 4.2.2 firmware (without knox) will work on a 4.4 bootloader ??? (again i don't care about knox working or not)
Click to expand...
Click to collapse
HI ,
Mate if you flash with Odin or OTA (kies) you will change the bootloader , ok? so once you have a 4..4 bootloader installed there is no way to install back a 4,2,2 stock ( official ) firmware , 4.4.2 official firmware includes 4.4.2 bootloader and flashing an older bootloader than the one you have is not possible (yet)
your options are:
4.2.2 bootloader
stay there do nothing
Upgrade to official 4.4 and not be able to downgrade to 4.2.2 official
root , install CWM and install any custom rom you want ( 4.2.2 , 4.3 or 4.4.2 and 4.4.4 ) and if you do not like any of them go back to official 4.2.2
Once you upgrade to official 4.4.2 there is no way to go back to official 4.2.2 , the only way to go back to 4.2.2 would be with a custom rom
MAX 404 said:
HI ,
Mate if you flash with Odin or OTA (kies) you will change the bootloader , ok? so once you have a 4..4 bootloader installed there is no way to install back a 4,2,2 stock ( official ) firmware , 4.4.2 official firmware includes 4.4.2 bootloader and flashing an older bootloader than the one you have is not possible (yet)
your options are:
4.2.2 bootloader
stay there do nothing
Upgrade to official 4.4 and not be able to downgrade to 4.2.2 official
root , install CWM and install any custom rom you want ( 4.2.2 , 4.3 or 4.4.2 and 4.4.4 ) and if you do not like any of them go back to official 4.2.2
Once you upgrade to official 4.4.2 there is no way to go back to official 4.2.2 , the only way to go back to 4.2.2 would be with a custom rom
Click to expand...
Click to collapse
If i understood right, you are saying that can be done if i flash a custom rom as intermediate step between official 4.4 and official 4.2 ??
fdlm82 said:
If i understood right, you are saying that can be done if i flash a custom rom as intermediate step between official 4.4 and official 4.2 ??
Click to expand...
Click to collapse
No . I did not say that
Once you are in an official 4.4.2 firmware , the only way to use a 4.2.2 rom would be by flashing an un official 4.2.2 custom rom
MAX 404 said:
No . I did not say that
Once you are in an official 4.4.2 firmware , the only way to use a 4.2.2 rom would be by flashing an un official 4.2.2 custom rom
Click to expand...
Click to collapse
Ok, thanks for the info.
in the following this thread they have installed a 4.3 rom over a 4.4 bootloader: http://forum.xda-developers.com/showthread.php?t=2744061
maybe someone find a similar way to install a 4.2....
fdlm82 said:
Ok, thanks for the info.
in the following this thread they have installed a 4.3 rom over a 4.4 bootloader: http://forum.xda-developers.com/showthread.php?t=2744061
maybe someone find a similar way to install a 4.2....
Click to expand...
Click to collapse
Ok mate ,
Good luck .

[Q] 4.4.2 Downgrade to 4.2.2, is this possible yet?

Hey guys, my question is there:
Its possible to downgrade from 4.4.2 to 4.2.2 ?
I have been reading alot of threads with similar question but i gives to many answer.
Im on a rooted 4.4.2 and i will just back to 4.2.2 because i will a !!completely!! Knox free rom and bootloader.
I dont care about the warrenty, my is run out.
I dont will not only a downgraded rom but also a downgraded bootloader.
When someone have trying a to downgrade from 4.4.2 to 4.2.2 please post here the result.
When a downgrade to 4.4.2 is not possible than which is the lowest firmware which i can flash?
Please try to keep the thread clear and give a usefull answer. Thank you guys
And please dont kill me for my english :good:
Once the bootloader has been upgraded to a Knox-enabled version, you cannot downgrade it. The ROM can be downgraded regardless of the bootloader, but running a Knox-free ROM with a Knox-enabled bootloader will result in a "Kernel is not SEAndroid Enforcing" message to appear on the splash screen every time the device is rebooted.
Okay too Bad...
A question more, i have been reading that a downgrade (Rom+Bootloader) is possible to 4.3, because there have the same Bootloader but just less aggressiv. Is that true?
When yes you can share a stock samsung rom 4.3 without knox?
Thank you for the answer
Sent from my GT-I9505 using XDA Free mobile app
You can downgrade with a custom 4.2.2 rom. You just need to look for one.
Okay that i understand but can i downgrade the Bootloader to 4.3? Because there is similar to our one.
Sent from my GT-I9505 using XDA Free mobile app
Can we use official ROM
Can we downgrade without using Custom ROM?
If we unpack Official tar ROM and remove the bootloader and modem of it and then repack it to tar.
Can that downgrade the Android version from 4.4.2 to 4.2.2?
Or it is not working?
Andro-Man said:
Can we downgrade without using Custom ROM?
If we unpack Official tar ROM and remove the bootloader and modem of it and then repack it to tar.
Can that downgrade the Android version from 4.4.2 to 4.2.2?
Or it is not working?
Click to expand...
Click to collapse
It's possible to downgrade to stock 4.2.2 but a custom kernel such as KT-SGS4 will probably be needed to get the WiFi working.
Simply reinstalling the 4.2.2 modem files using Odin should be sufficient to get the WiFi working. No need of a custom kernel. It is also possible to downgrade the ROM without going through the routine of unpacking and repacking the ROM. Simply flash it through Odin, although you'd need to flash the modem files a second time to get the radios fully functional, as previously mentioned. Just be aware that the bootloader will not change, so every time you boot the 4.2.2 ROM with the Knox-enabled bootloader you will get a message on the splash screen about the kernel not being in enforcing mode.
I have trying this:
I take a orginal XXUBMF8 4.2.2 delete inside the zip bootloader and some other files repack back to .tar
Flash it all fine but then the error, the software is not authorized and on the top secure fail: kernel.
I tried flash a custom 4.2.2 kernel through odin but the same result.
My DL Modus look so: https://dl.dropboxusercontent.com/u/93311676/DSC_0014.JPG
Now i get back to 4.4.2 GNG8

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