[Q] Downgrade from 4.4 to 4.2 - Galaxy S 4 Q&A, Help & Troubleshooting

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 .

Related

[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.

i337m 4.2.2 upgrade to 4.4.2 avoid Knox

Reading the forums, and i am more confused than when i started.
Anyhows i have a Rogers i337m at 4.2.2 rooted. Want to upgrade to 4.4.2 and avoid the Knox Trip. From what i understand 4.2.2 doesn't have knox. It came from 4.3 and above.
So whats the best approach to go about the upgrade that would allow me to come back to 4.2.2 so i can put it back to stock if required.
warhawk_la said:
Reading the forums, and i am more confused than when i started.
Anyhows i have a Rogers i337m at 4.2.2 rooted. Want to upgrade to 4.4.2 and avoid the Knox Trip. From what i understand 4.2.2 doesn't have knox. It came from 4.3 and above.
So whats the best approach to go about the upgrade that would allow me to come back to 4.2.2 so i can put it back to stock if required.
Click to expand...
Click to collapse
Install a custom recovery and install a 4.4.2 KK ROM - don't do the official update. The official update will update your bootloader allowing you to only SafeStrap and install TouchWiz ROMs.
djpharoah said:
Install a custom recovery and install a 4.4.2 KK ROM - don't do the official update. The official update will update your bootloader allowing you to only SafeStrap and install TouchWiz ROMs.
Click to expand...
Click to collapse
Go with Mapple leaf from iB4STid. works good on I337M.

Downgrade I9500

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.

[Q] Old Bootloader

Sorry if this is a noob question but will running an old bootloader (say 4.4.2 NA6) with a newer official rom (like 4.4.2 NE4) allow me to downgrade using Mobile Odin Pro?
And if thats the case, are there likely to be any performance issues with running an old bootloader with a new firmware?
KitKat boatloader works on all KitKat roms. Is good to update to latest boatloader to match the rom but no biggie if not.
ddogishere said:
KitKat boatloader works on all KitKat roms. Is good to update to latest boatloader to match the rom but no biggie if not.
Click to expand...
Click to collapse
so then will i be able to downgrade from newer roms to older roms with mobile odin (seeing as it doesnt touch the bootloader) if i have the oldest KitKat bootloader installed?
you can move to all 4.4.2 rom you want but NO downgrade to 4.3 rom
I'm on NA6 BL with NG1 rom
rayman95 said:
you can move to all 4.4.2 rom you want but NO downgrade to 4.3 rom
I'm on NA6 BL with NG1 rom
Click to expand...
Click to collapse
How is your battery life?
adb7 said:
How is your battery life?
Click to expand...
Click to collapse
good but actually I'm on liquidsmooth rom
but if you want to go to NG1 base you should flash NG1 modem to have good combination specially for battery

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