Hi,
I am on the latest stock NG1 Rom after upgrading with Mobile Odin Pro from NB7 which I had successfully rooted with Towelroot. Since MOP doesn't flash bootloaders I am still on the old NB7 bootloader and so far I am fine and don't have any issues. But I have 2 questions.
First, is it better to subsequently flash the new bootloader with Odin each time I upgrade my firmware with MOP and everroot? Are there any benefits to that?
And secondly: if I upgrade my old NB7 bootloader to NG1 now and later - if I get softbricked or smth - downgrade again to NB7 with Odin to reroot the phone with Towelroo,t will I trigger Knox because of downgrading the bootloader?
Thanks very much in abvance.
Its not possible to downgrade your bootloader. End of conversation.
speedyjay said:
Its not possible to downgrade your bootloader. End of conversation.
Click to expand...
Click to collapse
Which means that if I upgrade the bootloader to NG1 and then try to flash with Odin the NB7 firmware with the old bootloader I simply won't be able to boot or get bricked?
Or maybe I can reflash the old NB7 firmware and then (without auto start option in Odin) flash the new bootloader right away to get the phone running?
For example: if you were on Android V4.3 you will be on the Jelly Bean bootloader. If you then updated to Android V4.4 your Jelly Bean bootloader will be updated to the KK bootloader. However, you can still run Jelly Bean on the KK bootloader. But you cannot downgrade the KK bootloader to the older Jelly Bean bootloader.
Related
I have i9500 and its have 4.3 jellybean stock rooted.
All I want to know that can I update my phone to kitkat 4.4.2 officially with kies?
I have also try the update my phone, but massage appears that you have modified your phone and you can't update. .
Flash via Odin yourself
is it official 4.4.2?
qtwrk said:
Flash via Odin yourself
Click to expand...
Click to collapse
thanks for replying but is it save that flash 4.4.2 via odin and after flash will I receive the official update from samsung?
And one thing, after flashing to 4.4.2 I have to root the phone again or not.???
Thing is, odin 4.3 or other old firmware and then OTA to 4.4.2 , or odin 4.4.2 firmware in the first place, it's same process you have to do but with different firmware.
Yes, if you leave newly flashed firmware untouched.
You will probably have to root again.
You can also choose odin flash recovery and then flash pre-rooted ROM to have everything done in less process
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 .
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!
is it possible to downgrade lollipop stock rom to stock jellybean?or do i need to downgrade first to kitkat stock before downgrading to jellybean?i want to do this because i have apps that i used when im on jellybean which is not compatible with kitkat and lollipop.
Using Odin you should be able to downgrade directly to Android 4.3
You will have to do a factory reset in recovery.
I did my factory reset after downgrading the firmware, but guessing you could do it before the downgrade and then not have to worry about the auto-reboot in Odin.
Hi
I have a problem during flashing from 4.4.2 to 4.3. After start the process fails by aboot.mbn. If I remove the file aboot.mbn in the md5-package and start the process again, it works. The mobile flashs back to 4.3, but it hasn't sound and I can't record Video or Soundmemo. Please help! I don't what to do.
I'm looking forward.
Best wishes
Aboot.mbn is the bootloader. You cannot flash a 4.3 bootloader over a 4.4.2 bootloader.
audit13 said:
Aboot.mbn is the bootloader. You cannot flash a 4.3 bootloader over a 4.4.2 bootloader.
Click to expand...
Click to collapse
Is there any way to go around the bootloader? Would it help to flash lollipop 5.0.1 and then to flash back to jelly bean 4.3 or the lollipop has a bootloader locker too.
Thank's so much!!
There is no way to downgrade the bootloader to 4.3 once the phone has been flashed with 4.4.2 or newer. This applies to many Samsung phones including the s3, note 3, note 4, etc.
audit13 said:
There is no way to downgrade the bootloader to 4.3 once the phone has been flashed with 4.4.2 or newer. This applies to many Samsung phones including the s3, note 3, note 4, etc.
Click to expand...
Click to collapse
I flashed my S3 from 4.4.4 to 4.3 and tab 3 from 4.4.2 to 4.2.2 without any problems...why it doesn't works on S4?
Are you sure that the ROM you used to downgrade included a bootloader?
For the s3, it may be possible to go to a 4.3 bootloader as there was no bootloader after 4.4.2 but I'm not 100% sure. I have no idea about the tab.
audit13 said:
Are you sure that the ROM you used to downgrade included a bootloader?
For the s3, it may be possible to go to a 4.3 bootloader as there was no bootloader after 4.4.2 but I'm not 100% sure. I have no idea about the tab.
Click to expand...
Click to collapse
Hi,
yes, there were one. I've rolled my s4 back to 4.3 now, but I have no sound in it...What can I do?
I'm looking forward.
Best wishes.
You installed the 4.3 bootloader too? You may want to run Samsung Phone Info from the play store to confirm.
audit13 said:
You installed the 4.3 bootloader too? You may want to run Samsung Phone Info from the play store to confirm.
Click to expand...
Click to collapse
I'm not sure. I removed the file aboot.mbn and converted the md5 archive to tar archive and finaly flashed my s4. It works, but there's only no sound in thy system.
Dr Goodvibes said:
Using Odin you should be able to downgrade directly to Android 4.3
You will have to do a factory reset in recovery.
I did my factory reset after downgrading the firmware, but guessing you could do it before the downgrade and then not have to worry about the auto-reboot in Odin.
Click to expand...
Click to collapse
I'm not able to downgrade it from lollipop too. I haven't the option to unlock the oem in the developer options
The OEM unlock bootloader option is only useful where a phone has a locked bootloader. In the case of your s4, the bootloader is not locked and cannot be downgraded.
The aboot.mbn file is the bootloader and removing it means the phone is running a 4.3 ROM on a 4.4.2 bootloader. This is probably why not every works properly.
audit13 said:
The OEM unlock bootloader option is only useful where a phone has a locked bootloader. In the case of your s4, the bootloader is not locked and cannot be downgraded.
The aboot.mbn file is the bootloader and removing it means the phone is running a 4.3 ROM on a 4.4.2 bootloader. This is probably why not every works properly.
Click to expand...
Click to collapse
How can I solve this problem?
You can solve the sound problem by flashing a newer ROM.
You cannot downgrade the bootloader and trying to downgrade may brick the phone by damaging the bootloader.
audit13 said:
You can solve the sound problem by flashing a newer ROM.
You cannot downgrade the bootloader and trying to downgrade may brick the phone by damaging the bootloader.
Click to expand...
Click to collapse
Why it worked with tab 3 and s3? I saw many videos on youtube, there rolled guys the system back...Well, Ithink it's my fate to have the kitkat. I hate this system.
The s3 and Tab 3 are totally different items. Being able to downgrade a bootloader on one device does not automatically mean every bootloader in a company's product line can be downgraded.
Have you tried running a custom ROM on the phone? You may find those more palatable.
audit13 said:
The s3 and Tab 3 are totally different items. Being able to downgrade a bootloader on one device does not automatically mean every bootloader in a company's product line can be downgraded.
Have you tried running a custom ROM on the phone? You may find those more palatable.
Click to expand...
Click to collapse
Can I flash for example cyangenmod 12 and then flash android 4.3?
There is no way to run a completely stock 4.3 ROM, including the bootloader, on the s4 once it has been upgraded to 4.4.2 or 5.01.
audit13 said:
There is no way to run a completely stock 4.3 ROM, including the bootloader, on the s4 once it has been upgraded to 4.4.2 or 5.01.
Click to expand...
Click to collapse
In 2013 there were S4 with 4.2.2. Why I can't roll my system back?
I have a question since I watched the youtube video on how to upgrade my phone samsung s4 at&t to Oreo, but I read that I need a bootloader. Then when I read articles here in xda, mostly says that this phone can't be unlock? so How do I deal with this? Please explain simply because I am new in this.
If the phone is running an MDL bootloader, it may be possible to flash Oreo. If the phone is running a newer bootloader, the phone can only run TWRP and will not run Nougat or Oreo.
hjayc24 said:
I have a question since I watched the youtube video on how to upgrade my phone samsung s4 at&t to Oreo, but I read that I need a bootloader. Then when I read articles here in xda, mostly says that this phone can't be unlock? so How do I deal with this? Please explain simply because I am new in this.
Click to expand...
Click to collapse
You cannot unlock the bootloader. However, if you're on the MDL bootloader then you can use an exploit called loki doki to install a custom recovery and a custom ROM. If you're on a newer bootloader other than MDL, then you are stuck with only booting custom touch wiz based ROMs and must use safe strap if on kit kat or flash fire if on lollipop.
Can you oden back to mdl if you are running NJ4.
does it matter id i upgraded to Kittkatt with a custon rom vs ota update on if the bootloader got locked? does goldeneye kittkatt 4.4.4 lock the bootloader?
cousindan said:
Can you oden back to mdl if you are running NJ4.
does it matter id i upgraded to Kittkatt with a custon rom vs ota update on if the bootloader got locked? does goldeneye kittkatt 4.4.4 lock the bootloader?
Click to expand...
Click to collapse
No you cannot odin back to MDL, if you try you will brick your phone. It doesn't really matter how you update given your bootloader is locked (unless you're on the MDL firmware). Golden eye ROM does not lock the bootloader, no custom ROMS lock the bootloader.