Nougat to Marshmallow - T-Mobile Samsung Galaxy Note5

I'm trying to downgrade my 920T to MM (DPG1 specifically) so I can install Darthstalker. I see a lot of responses that simply say you can't do it without any explanation. I've ODINed all the way back to EQC6, but it won't accept anything MM based. I even tried installing Darthstalker over EQC6 (some on that thread claimed it worked), but I get a bootloop. I see hints that it has something to do with the bootloader. Can I install an old bootloader before I load the MM ROM? I find it hard to believe that this can't be done.

You should be able to Odin back to firmware DPH2 as that uses the the same bootloader number 4 as nougat. The 5th digit from the right in the firmware version is the bootloader number. Hope this helps.

I'll give that a try

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SM-G955U1 Stuck trying to downgrade to Nougat

I have a SM-G955U1 I'm trying to downgrade to Nougat since Oreo totally borked the bluetooth in both my cars (both BMW's - audio connects ~50% of the time, phone book no longer transfers).
I'm failing to flash G955U1UES2AQL1 with Prince Cosmey Odin v3.12. The error I keep receiving is:
SW REV CHECK FAIL : [abl]Fused 3 > Binary 2
I've also tried to flash G955USQS2BRB1.
A quick Google says it's because I'm trying to downgrade versions, but doesn't this model have an unlocked bootloader?
What am I doing wrong? Any guidance is greatly appreciated.
What firmware are you on now? If your on bootloader 2 there's no going back to bootloader 1 which is nougat. Bootloader's are locked on U phones, once you upgrade there's no going back........they took that directly from IOS book of being a holes.
str8shot said:
I have a SM-G955U1 I'm trying to downgrade to Nougat since Oreo totally borked the bluetooth in both my cars (both BMW's - audio connects ~50% of the time, phone book no longer transfers).
I'm failing to flash G955U1UES2AQL1 with Prince Cosmey Odin v3.12. The error I keep receiving is:
SW REV CHECK FAIL : [abl]Fused 3 > Binary 2
I've also tried to flash G955USQS2BRB1.
A quick Google says it's because I'm trying to downgrade versions, but doesn't this model have an unlocked bootloader?
What am I doing wrong? Any guidance is greatly appreciated.
Click to expand...
Click to collapse
Sounds like your on the version 3 bootloader who I believe only noug firmware is the binary all the rest is Oreo. You may be outs luck until either root to fix or Samsung releases a fix
Huh. That sucks. I bought the unlocked version of the phone thinking it'd be totally unlocked (bootloader and all).
Might be time for a pixel. :/
I'm pretty sure that you cannot unlock your snapdragon bootloader kn your US device. You have a "Sim unlocked" device that will work with any provider.
/\- When a manufacturer says "Unlocked" all they mean is sim unlocked. No going back right now, best you could do is flash PartyCyborg Rom for Snap and that will get you to nougat as well as root, since this does work with v3; but you'll only be able to charge to 80%.
Delete
bmxmike said:
/\- When a manufacturer says "Unlocked" all they mean is sim unlocked. No going back right now, best you could do is flash PartyCyborg Rom for Snap and that will get you to nougat as well as root, since this does work with v3; but you'll only be able to charge to 80%.
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Click to collapse
I desperately need downgrade from oreo to nougat version and this is my problem, the bootloader version...
there is something like nougat with bootloader 2 could be official (preferably) or custom rom (last option)
That's the issue. There is no bootloader 3 nougat, you are on 3 not 2 that's the issue with your downgrade. The only thing I see working is flashing PartyCyborg Rom which works on v3 bootloader and pretty sure is still nougat. Go check his thread as I know there are a few things like o only being able to charge to 80%

Trouble Flashing Samsung S7 to Android 7.0

Hey so.. Phone's root bugged out yesterday and I downloaded twrp and decided I should upgrade it to Android 8.0 then root it. After many hours of failures I managed to flash a 8.0 but I couldn't make the CSC to work, since my phone is region locked to another country so I decided to go back to 7.0 and try again.. but now here it gets complicated because I really don't know what to do. I'm not sure how exactly to go back from 8.0 to 7.0.. Can someone give me detailed steps on what should I do.. I'd be very grateful!
PS. I don't know if I'm posting this in the right forum thread.
Here https://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin
Same site, or sammobile can be used to get the firmware files to flash with Odin
Note: The last version of 7.0 locked the ability to downgrade, I haven't gone to Oreo so can't confirm, but it ability to downgrade may also be removed from Oreo.
Beanvee7 said:
Here https://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin
Same site, or sammobile can be used to get the firmware files to flash with Odin
Note: The last version of 7.0 locked the ability to downgrade, I haven't gone to Oreo so can't confirm, but it ability to downgrade may also be removed from Oreo.
Click to expand...
Click to collapse
I can confirm, downgrading from Oreo 8.0 to Nougat 7.0 is possible, even without tripping knox.
It's just flashing the previous firmware with odin and factory reset the phone before first run and you're fine to go

Delete .bin files from older firmware to downgrade to an older bootloader version?

Id like to downgrade my S7 from nougat to marshmallow. My current lowest factory reset option is nougat on bootloader version 3. Id like to downgrade to a downloaded stock firmware that uses version 1 of the bootloader.
my device is currently rooted and carrier unlocked
ive made a full backup of the nougat system, before ive done anything to it other than the rooting.
ive been reading around that some people were able to bypass the downgrade bootloader lock error in odin by first going into their desired downgraded firmware tar files and deleting any file that ends in .bin , and then successfully been able to flash the older firmware. what I want to know is if i decide to try this, and it still doesnt work in odin, or something still doesnt work properly - am i still able to fully restore from that backup ive just made? has anyone done this without issues? i hate the look and feel of nougat and oreo looks and feels the exact same...
i did make another thread about downgrading, but i didnt know nearly as much at the time. Been told downgrading is impossible and thats true, officially speaking. Id just like to know if anyone has been successful with this workaround.
What model, SM-G930F? Is OEM Unlocking turned on?
If it's a G930U/V/T/A/P then you won't be able to.
For the G930F so long as you don't have the latest Nougat version it shouldn't prevent downgrading. Otherwise upgrading up to Oreo then back down just by flashing in Odin should work, as Oreo doesn't have the downgrade lock that the newest Nougat has.
Beanvee7 said:
What model, SM-G930F? Is OEM Unlocking turned on?
If it's a G930U/V/T/A/P then you won't be able to.
For the G930F so long as you don't have the latest Nougat version it shouldn't prevent downgrading. Otherwise upgrading up to Oreo then back down just by flashing in Odin should work, as Oreo doesn't have the downgrade lock that the newest Nougat has.
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Click to collapse
model is sm-g930w8 but yes OEM unlocking is on, and so is usb debugging just to be on the safe side. It is running the very first version of nougat right now, 7.0. But the security patch is from feb 2018. Ive read that the bootloader itself is unlocked on this version of the phone though, its just that downgrade protection in the software that could get in the way, if what i read was correct? in the same place was where i read that deleting those bin files from the firmware i want to install would be a good workaround, it would make the bootloader not check it at all if i read it correctly.
i havent tried anything yet, ive been doing my research first to stay on the safe side. it might work without issues, but I want to be prepared for if issues do arise, what the correct next step should be to keep the device itself not bricked
Yea not 100% sure for the G930W8, it's the same SoC as the G930F but the firmware restrictions could be different since it's the Canada specific version
so, i decided to brave it and try it, since to read around you find alot of conflicting information... i was suspecting that odin would fail shortly after starting at sboot.bin if it was the bootloader thats the issue. but it didnt. it failed the very next step after that at param.bin.
anyone happen to know what param.bin means?
What files are you trying to flash? I have had the same problem, even though the bootloader is unlocked the device has efuses that prevent downgrade to older binary. I was using U2 binary and only managed to downgrade to nougat u2 binary version. Even when I skipped bootloader files, marshmallow would still give an error that system.img is version 0 where as device is v1

Downgrading my (unrooted) carrier locked At&t Note 8.

My note 8 had OneUI pushed to it about a week ago even though I kept refusing not wanting to while I was sleeping. It says my bootloader is v5. This is actually what it says (N950USQU5DSD3). My problem is that when I search for the firmware I'm wanting to downgrade to (the last oreo update possible for this particular phone) on Sammobile I can't find the one for At&t. I see ones for Verizon, sprint, etc. But nothing for at&t, which one am I supposed to use and where can I get it? This is going to be my very first downgrade/upgrade, really my first time doing anything like it on android. And I CAN do this right? There's nothing I should be aware of that makes what I'm trying to do not able to be done is there? The biggest reason I'm asking is because I have very limited tools to work with, I have a little 12" Acer aspire one (no disk drive) running windows 7 home basic, mobile hotspot from my wife's phone(the last software I tried to download and use came from xda out of a thread I found titled, "Stock Oreo N950USQS5CRF6 Odin*files*for AT&T*NOTE*8" it failed halfway through 2 nights ago during the beginning of storm, and the whole time it would only download around 32kbs so it literally to FOREVER! Only for it to fail halfway through. Was I wasting my time or was this in fact the firmware I'm looking for? If not, as I asked before, where could I find it?? Thanks a bunch for any help.
https://forum.xda-developers.com/at...n950u-stock-n950usqs5crf6-odin-files-t3821222
^^^^^^^Is this all I need? Do I need to follow this tutorial or a different one?? What version of odin, do I need anything else
Sorry for so much all at once, I really hate this update and want Oreo back.
https://forum.xda-developers.com/ga...m-n950u-u1-t3685884/post74087340#post74087340
Follow the steps from the above-linked post, and follow them very carefully. I did, and I was able to successfully downgrade from Pie to Oreo on my AT&T NOTE8.
I actually flashed the unlocked firmware, which has zero AT&T bloat. It works just fine for my needs. I don't think AT&T WiFi calling works on this unlocked firmware (I haven't tried - I don't use it).
Caveat emptor: whichever version of Oreo you choose (either the AT&T stock, or the unlocked firmware), we are stuck on the February 2019 Android security patch.
Only Pie gets the latest security patches. As long as you are ok with this, then proceed with the downgrade to Oreo!
pyrolad said:
Caveat emptor: whichever version of Oreo you choose (either the AT&T stock, or the unlocked firmware), we are stuck on the February 2019 Android security patch.
Only Pie gets the latest security patches. As long as you are ok with this, then proceed with the downgrade to Oreo!
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Click to collapse
A little off topic, but has anyone seen an AT&T security update for May yet? I'm still on April security, and it's basically mid June?
Tha k you I'll check it out when I get off work, I didn't know you could flash the unlocked firmware on a carrier locked phone
Let me get this straight. Can a locked bootloader AT&T SM-N9500U on Android 9, N9500USQU5DSD3 downgrade to Oreo? I thought this bootloader whould not let you go back.
I LOATH Pie and wan to go back to Oreo so bad, please tell me there is a for sure way. This is my first permanently locked bootloader phone and it's killing me not to flash an software I prefer.
I dont know I wish someone could tell me forsure whether it will work or not because now my phone is getting another software update notification so it's getting ready to force another update on me and I doubt after that I will still have bootloader v5. Can someone please verify whether my current bootloader (N9500USQU5DSD3) will downgrade successfully to back to oreo or not? I have the oreo firmware I want to use downloaded and ready to go which is (SM-N950USQU5CRL1). Can I downgrade to this without messing anything up?? Please I need a fast reply I dont want this new update forced to my phone and updating my bootloader to v5 where I can ever go back to oreo.
marhodges said:
Let me get this straight. Can a locked bootloader AT&T SM-N9500U on Android 9, N9500USQU5DSD3 downgrade to Oreo? I thought this bootloader whould not let you go back.
I LOATH Pie and wan to go back to Oreo so bad, please tell me there is a for sure way. This is my first permanently locked bootloader phone and it's killing me not to flash an software I prefer.
Click to expand...
Click to collapse
Yes you CAN downgrade back to Oreo. BUT you MUST go to a bootloader 5 firmware.
---------- Post added at 07:55 AM ---------- Previous post was at 07:54 AM ----------
Superloud024 said:
I dont know I wish someone could tell me forsure whether it will work or not because now my phone is getting another software update notification so it's getting ready to force another update on me and I doubt after that I will still have bootloader v5. Can someone please verify whether my current bootloader (N9500USQU5DSD3) will downgrade successfully to back to oreo or not? I have the oreo firmware I want to use downloaded and ready to go which is (SM-N950USQU5CRL1). Can I downgrade to this without messing anything up?? Please I need a fast reply I dont want this new update forced to my phone and updating my bootloader to v5 where I can ever go back to oreo.
Click to expand...
Click to collapse
Yes you can go to that firmware. You will want to back up and allow it to factory reset. Be sure to use the modified version of Odin. Go HERE, post #2

Any way to downgrade from Nougat to MM without losing FP Sensor,Haptic Feedack&Camera

Any way to downgrade from Nougat to MM without losing FP Sensor,Haptic Feedack&Camera
I recently purchased a new S7 not realizing that it was equipped with a Nougat OS. I would like to restore my current phone to the new one, but my current phone runs on MarshMallow. After restoring the backup, my new phone has no haptic feedback, no fingerprint sensor with "an error has occurred with the fingerprint sensor. if this message appears repeatedly, restart your phone" message and the Camera doesn't work.
I'm sure it has something to do with bootloader N using MM. Even restoring Stock Marshmallow firmware (Including BL) on the new phone removes these functions. Does anyone have any ideas on how I can get these to operate?
My current phone has
Bootloader Version: G930W8OYA2APK3 (MM)
Baseband and PDA Version: G930W8OYA2API1 (MM)
When I restore my old phone to the new one, it ends up with
Bootloader Version: G930W8OYA2BQK4 (N)
Baseband and PDA Version: G930W8OYA2API1 (MM)
EDIT: Just tried the Nougat firmware with MM Bootloader. All of the functionality is present.
Bootloader Version: G930W8OYA2API1 (MM)
PDA Version: G930W8OYA2BQK4 (N)
Just restored old backup with MM bootloader (Boot, Data, System only).
No Fingerprint Sensor or Camera.
BTW, ignore the HAPTIC FEEDBACK portion of this post. I believe it is working.
Any help with this matter would be greatly appreciated.
Not possible to downgrade since the bootloader block you from flashing lower version of that. You may try to flash without BL, but your phone will be malfunction
Thank you for your reply. I don't think I'll be able to get the fingerprint wizard to work but having a functional camera would be a necessity. From the System/Priv-App folder I copied the SamsungCamera5 (from MM) and the SamsungCamera6 (from N) onto an SD Card. I guess I can try to play around with them to see if either will work, but I don't think they will since my restored backup should already have SamsungCamera5 and the SamsungCamera6 apk probably isn't compatible with MM. Kinda disappointing that I'll have to continue to use my old phone with a broken screen instead of the brand new one I purchased.
Sleaze0 said:
Thank you for your reply. I don't think I'll be able to get the fingerprint wizard to work but having a functional camera would be a necessity. From the System/Priv-App folder I copied the SamsungCamera5 (from MM) and the SamsungCamera6 (from N) onto an SD Card. I guess I can try to play around with them to see if either will work, but I don't think they will since my restored backup should already have SamsungCamera5 and the SamsungCamera6 apk probably isn't compatible with MM. Kinda disappointing that I'll have to continue to use my old phone with a broken screen instead of the brand new one I purchased.
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Click to collapse
do not flash AP from a firmware set made prior to the bootloader youre on, it will more than malfunction, itll probably brick
i went back and read all the tl : dr stuff and saw that you seem to have got it working, oddly enough. The camera issue is likely the kernel
Thanks for the info on the thanks button. I've just about given up trying to get Marshmallow to work properly on this phone. Looks like it'll take weeks to configure my new Nougat phone to be similar to the three years of tweaks I've made to my old MM one. Oh well, first world problems I guess.
As others have pointed out, you can't use Odin to successfully flash a ROM with a bootloader that is earlier (in version) than the bootloader you have installed. The "gatekeeper" is Odin, however, not the bootloader.
Though I haven't tried it, it is my understanding that there is a way around this. Install TWRP, and use it to install a custom ROM which uses the version of bootloader that you want/need. Once the bootloader has been rolled back, you can use Odin to reinstall Nougat (or whatever). I don't know whether this might require a particular build of Odin, but I doubt it
Droiderat said:
As others have pointed out, you can't use Odin to successfully flash a ROM with a bootloader that is earlier (in version) than the bootloader you have installed. The "gatekeeper" is Odin, however, not the bootloader.
Though I haven't tried it, it is my understanding that there is a way around this. Install TWRP, and use it to install a custom ROM which uses the version of bootloader that you want/need. Once the bootloader has been rolled back, you can use Odin to reinstall Nougat (or whatever). I don't know whether this might require a particular build of Odin, but I doubt it
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Click to collapse
i cant even begin to imagine how/why that would work. the bootloader doesnt really care what ROM you install, its the other way around. The ROM being installed has to be compatible with the bootloader. So, installing a ROM wouldnt really do anything to the bootloader and therefore wouldnt be able to bypass the lock in knox.
The procedure I outlined apparently works where the custom ROM includes a related bootloader. Thus, when it is installed via TWRP, it replaces both the existing ROM and the bootloader. I know that TWRP can be used to install a bootloader, as I have done it (on a SM-930F). And if the gatekeeper is Odin and not the bootloader itself, then this could work.
As I stated, I haven't tried this, nor have I extensively researched it. I've only read about it, and am passing it along as a possible solution.
This post can be closed since the phone was deemed Lost or Stolen by the carrier, therefore they couldn't unlock it for me to use my SIM card. I've since returned the phone. At least I learned a few lessons for my next one. Mainly, back up the phone when you first get it. Thanks again for all of the feedback.

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