hi all,
I have flashed a new bootloader comes with BTUMJ3 official firmware and now I wanna flash an older bootloader, so is it possible
now ? if so, how to do ? or how to bypass the bootloader check ?
thank you all
AFAIK downgrading isn't possible...from MJ3
Sent from my SM-N9005 using Tapatalk
If You have a Nandroid backup from a older Rom You can restore it, no problems. I think the problems are whit Odin only.
If you flash a Customer Rom like Omega MI7 by recovery, work well also. We have a example already.
The bootloader continue MJ3.
Related
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
Hi
I'm planning to install the FoxHound Rom (here), but it requires to flash the new bootloader and modems.
As a newbie in the Android world, and after some searches, i would like to know if it is possible to backup the current bootloader and modems, and will i be able to downgrade ?
Moreover, i've seen that by flashing a new bootloader, it will not be possible to flash some ROM, am i right ?
Thank you
If your on the old bootloader you do not need the new one to flash a custom rom via recovery. It's recommend to install a kit kat modem. I'm on the old bootloader and no issues running the custom roms. There is no way to backup the old bootloader. Once your on the new knox bootloader you can not downgrade no longer.
Sent from my GT-I9505 using Tapatalk
So, you mean that i can flash the FoxHound Rom by flashing the new modems only ?
Thank you.
Initially it is recommended you flash a kit kat modem. You can change this later. I'm running an old modem on kit kat
Sent from my GT-I9505 using Tapatalk
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
Hi everyone, I have question that I hope you can answer.
Today I flashed a Custom Recovery and Rooted my Note 3 SM N900. Everything is working fine, I rooted my phone in order to delete apps like trip advisor, s health among other apps. But I've seen that there are 6.0 ROMs for my phone. I've seen many tutorials and I would like to flash a custom ROM. (I'm thinking on flashing Resurrection Remix 5.1.1 for my SM N900). I already made my efs folder backup.
So, my question is this. When I decide to go back to a stock ROM (Lollipop Samsung Touchwiz the one I currently have) do I need to do something extra? Like, I would be able to flash a sotck samsung ROM through TWPR recovery for example? or what I need to do is just flash through odin?
Could you please tell me what I need to know on this cases?
Thank you very much! :good:
just flash with odin and you r good to go
raman99311 said:
just flash with odin and you r good to go
Click to expand...
Click to collapse
And What about the bootloader? Do I Need to unlock it if I want to install any custom ROM? I installed TWRP recovery on my phone, then I Rooted the phone. The steps that I've seen on the Internet to flash a Custom ROM doesn't have a step that unlocks bootloader or so.
Or the bootloader is unlocked since I rooted the phone? I'm confused. I really appreciated if you or someone could explain this doubt.
Thanks in advance. :good:
N900 is already factory bootloader unlocked
Sent from my SM-N920C
Using a bootloader unlock app could brick the phone. The only note 3 I know of with a locked bootloader is the AT&T Sm-900a.
Hello,
Is there a way to dowgrade the bootloader of SM-G950F with stock fw G950FXXUCDUD1 to further flash a stock fw Android 8?
- flashing a downgraded bl with twrp?
- with "combination" fw?
- with a modified stock bl flashed with Odin?
...?
Thank you!
No. Samsung will not allow flashing of lower bootloader versions numbers.
Hello, thank you for your answer.
Even with a combination fw or directly flashing an older bootloader with twrp?
No.
Combination roms follow stock firmware regarding bootloader version ( can't downgrade). TWRP is a recovery image to replace stock, You can do more things in twrp over stock except downgrade stock firmware.
spawnlives said:
No.
Combination roms follow stock firmware regarding bootloader version ( can't downgrade). TWRP is a recovery image to replace stock, You can do more things in twrp over stock except downgrade stock firmware.
Click to expand...
Click to collapse
Ok, but what about this thread which seems to say it's doable with combination roms?
(Method) For everyone who wants to Downgrade Galaxy S8 to Oreo/Nougat
Hey guys! I recently read many Questions About downgrading the Galaxy S8 to 7.0/8.0 after we got the 5x Bootloader. Well many of you say NO but What many of you forgot is that there is a way to Downgrade your phone. I already had that Problem...
forum.xda-developers.com
I've seen many guides on how to downgrade stock firmware. Most of them revolve around editing stock firmware. None of them mention whether the bootloader version was actually downgraded. To me personally you are essentially trying to install a custom type rom using by using stock firmware.
spawnlives said:
I've seen many guides on how to downgrade stock firmware. Most of them revolve around editing stock firmware. None of them mention whether the bootloader version was actually downgraded. To me personally you are essentially trying to install a custom type rom using by using stock firmware.
Click to expand...
Click to collapse
I checked and you're right. The minimal configuration for flashing the bl is a tar with cm.bin and sboot.bin and this leads to the usual error "... check fail(cm) device : x binary : y" (whatever odin version used... patched or stock)
reverse engineering sboot and cm.bin and changing the binary release doesn't help because the code is signed and verified by the PBL from the ROM.
The only way to do it should be to connect to the exynos jtag / uart / ? and to reverse engineering the soc (!) modifying the way the PBL check the SBOOT.
Adam Outler a researcher did it on GalaxyS (1 or 2!) more than ten year ago... (https://forum.xda-developers.com/t/how-to-hack-hardware-binary-and-bend-it-to-your-will.1338073/)
So... I think is doable with a lot of talent and patience...
Anyway, thank you for your help!