Downgrade Bootloader S8?! - Samsung Galaxy S8 Questions and Answers

Hi i want to downgrade the Bootloader.
I am on Oreo 8.0, is it possible?!
I have try arround with Factory Binaries but no luck,
edit:
Okay, now i have a RPMB PROVISIONING at boot and nothing happens.
When i try odin mode sometimes i see a red colored text ......bootloader exception.....blablablalbalblaalbaa
And after a few attempts i came into odin but i cannot flash the bootloader with odin.
Everytime fails!

Related

6.0.1 bootloader back to 5.1.1

Does anyone know if it is possible to downgrade back to 5.1.1 bootloader after flashing the 6.0.1 one?
With the Note 3 I lost the imei and baseband etc trying to downgrade certain bits, so I don't want the hassle if that is going to be the case with 6.0.1 and 5.1.1.
i tried flashing also 6.0.1 and ended bricking my phone. would love to see if you find a solution for that.
mrelie007 said:
i tried flashing also 6.0.1 and ended bricking my phone. would love to see if you find a solution for that.
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Can you still get into download mode?
When I put bobcat rom on mine I didn't change the bootloader to the older one, I was stuck on the s6 edge+ bootscreen, I have to plug USB into pc and then hold the power+home+vol down for a few seconds and that rebooted into download mode where I managed to flash the correct bootloader. You can also then restart the phone and use power+home+vol up to get into recovery to restore a back up. Not sure why I had to plug in USB cable though but if I didn't I couldn't reboot at all and was stuck on the bootscreen.
hi yes i can go in download mode and i can go in twrp. but flashing a new rom always fails for me. stock firmwares as well. can u attach me ur bootloader plz so i can try it?
https://mega.nz/#!ScsAwbIC!hH4Djamv7FoeAUyDbHElKjaIlXLqvTZynPRqdJPwDas
This is the link to the bootloader I used (taken from bobcat thread)
Use download mode and put it in the BL part in odin.
can help me with bootloader 5.1.1
sm g928c

I think I downgraded my BL, but now im stuck

So after doing a bunch of file rearranging, My bl now says 10.9A (2012-08-27). But in order to do this, I had to flash it with the system of 4.4.2. So the BL is downgraded, but the "Get started" screen after booting up is completely frozen so I can't enable debugging to root or do motocolyps to unlock. What can I do?

How to unbrick my S8+ stuck at Galaxy S8+ logo?

I tried to root my phone today but after reboot, it got stuck in the boot screen which says "Samsung Galaxy 8+". I can only go to the download mode. I tried downloading the stock firmware and tried to flash it using Odin but the flash always fails to give a Fail! (DeviceInfo) error.
I don't know what to do. I am afraid the phone is not charging as well, it the battery dries out my phone will be dead. What should I do?
Did you try and root the new AQG5 base? Flashing TWRP or CF Auto root will fail if you do so. If this is the case then follow the guide @Nameless provided https://forum.xda-developers.com/galaxy-s8/help/stuck-bootloop-flashing-aqg5-fix-t3636857 and throw him a thanks.
If you didn't do that and Odin still continues to fail when flashing stock you should give Smart Switch a try and go for an emergency recovery. You will need your device model number and S/N code ready. http://www.samsung.com/dk/smart-switch/
i have the equal problem my s8 stay in boot screen and in odin fail stock firmware! plz help me TT i can go the download mode but cant flash stock rom with odin

G935F FRP lock out of nowhere, "Device does not have DRK" after stock firmware flash

G935F FRP lock out of nowhere, "Device does not have DRK" after stock firmware flash
Hello. I and my friend have a lot of problems currently with the phone.
The phone had randomly thrown the FRP lock on, and it became unbootable. (gets stuck at logo and would tell that "custom binary locked by frp lock"). The phone previously had stock firmware.
The first fix we've attempted was to flash the stock Oreo firmware (G935FXXU2ERE8) via Odin. But after flashing, It got stuck at bootloader logo without any additional text this time.
Then we've tried to flash an older firmware (G935FXXU2DRC4), and then the phone started throwing the "Device does not have DRK" error.
After booting to recovery, it says "Please flash ENG binary then install DRK".
After reboot via recovery, it started throwing a dm-verity error (0x02).
After some Googling I've found out that It's fixable with a boot file flash. But I couldn't find one for current firmware. Maybe we could just use combination sboot file (pakfirmware.com/2017/11/samsung-frp-samsung-s7-edge-g935f-sboot-combination-file), or should I find one that's specific to the current firmware?

G930V will not boot no matter what. please help

I have a co-worker's G930V that decided it wanted to only boot to the 'no command' recovery thing (not the menu, just blue with no command'), it's devolved to the point where he doesn't care about the data on it, just trying to get it working.
Info:
It's FRP locked (he knows the login, so this isn't important)
It's on binary 10 (can ONLY flash firmware CSF2 as far as I can tell)
Things I've tried and outcomes
Smartswitch: 'unsupported device'
Verizon's tool: 'Unsupport dev_type'
Odin flashing BL/AP/CP/CSC anything other than CSF2: 'SW REV CHECK FAIL'
Odin flashing BL/AP/CP/CSC for CSF2: 'recovery booting' followed by it rebooting and sometimes getting to a screen with a percentage bar that just says 'Error' (attached)
Odin flashing PIT/BL/AP/CP/CSC: same as non put odin
Odin flashing PIT/BL/AP/CP/CSC and NAND ERASE: same thing
I was able to get it to get to the encryption failed screen once by flashing just AP after a NAND ERASE PIT/BL/AP/CP/CSC.
I also got it to show "Custom Binary blocked by SECURE BOOT' by only flashing official firmware...
Update: There are other weird things that happen... I got odin to flash the latest G930U firmware and the same thing happens, I've also seen the grey circle with a lightning bolt screen leading me to believe its a battery issue.
IT WAS A BATTERY ISSUE, Tested with an S6 battery and once I flashed the Verizon firmware it booted right up.

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