Database Info

Rolling back to marshmallow

Hello.My question is what is the most simple way to get back marshmallow from nougat on a bootloader-blocked,non-rooted phone?
Im not satisfied with the Nougat and I want to use Marshmallow again.
Can i simply use Flashtool,or how can i proceed?
Thanks.

Anonymuszymus said:
Hello.My question is what is the most simple way to get back marshmallow from nougat on a bootloader-blocked,non-rooted phone?
Im not satisfied with the Nougat and I want to use Marshmallow again.
Can i simply use Flashtool,or how can i proceed?
Thanks.
Click to expand...
Click to collapse
using FLASHTOOL >> xperifirm
browse your device E6603 / E6633 etc and select your country and at the right you will se two builds Android MM and Android N ( 32.2.A.5.11)
download it ( resume if it disconnects)
once downloaded close xperifirm, let flashtool create FTF bundle for you to FLASH it (ON LOCKED BOOTLOADER)
this is the original untouched stockrom can be flashed on locked bootloaders

latest update from huawei

Latest update from huawei did the following to my phone which was a rooted mate 8. ( losing root access was a given i guess )
No bluetooth
No google account
No file manager
No virtual keyboard
No alarm clock
Google voice set to default with no other alternative....AND it doesn't work!
Themes don't work.
Factory reset stops at around 22% with an exclamation mark
Pretty nifty for a 5 minute "Official" update.
What am i supposed to do with this lump of hardware?
I have my bootloader code, i have srk tool. I was originally on b190 buildnumber, then went to b200...and now this. Can someone please suggest which build number i need so i can then find the right instructions for the downgrade or whatever it's called.

U need Rollback package
ubermorgan said:
Latest update from huawei did the following to my phone which was a rooted mate 8. ( losing root access was a given i guess )
Factory reset stops at around 22% with an exclamation mark
I have my bootloader code, i have srk tool. I was originally on b190 buildnumber, then went to b200...and now this. Can someone please suggest which build number i need so i can then find the right instructions for the downgrade or whatever it's called.
Click to expand...
Click to collapse
if you have Huawei Mate 8 L29 model & if you are on Android Nougat then you need rollback package
Here is the link
http://consumer.huawei.com/sg/mobile-phones/support/downloads/detail/mate-8-sg.htm?id=91647
This is straight from Huawei and it is really a life saver. Only this file will work in dload method for you at this moment especially when you have NRD test keys or want to downgrade form nougat to marshmallow.
Download the file
Extract the update.app
Make a folder in your external SDcard and name it as dload
Place the update.app in that dload folder.
You can dload method 2 ways.
method 1
switch off your phone
press and hold volume up, volume down and power button all together
Once you see EMUI on your screen release your fingers from the phone.
method 2
open your dialer
type *#*#2846579#*#*
select - software upgrade - > SD card upgrade
that's it.
Once you are done. You will be on C900BXX build number. Then you need to dload another firmware. And which firmware you need to flash is based on your phone region and model. Is your phone previous firmware L29C185BXX ? if yes then you have to flash L29C185B180 or B192 according to your model. This is really important. Please share your complete build number.
Once you succeed in these steps then we can discuss how to move forward and what to flash next.
Hope you find this information useful and hope you succeed.
Please don't forget to click on :good::good::good::good::good::good::good: on my posts.

Samavb said:
if you have Huawei Mate 8 L29 model & if you are on Android Nougat then you need rollback package
Here is the link
http://consumer.huawei.com/sg/mobile-phones/support/downloads/detail/mate-8-sg.htm?id=91647
This is straight from Huawei and it is really a life saver. Only this file will work in dload method for you at this moment especially when you have NRD test keys or want to downgrade form nougat to marshmallow.
Download the file
Extract the update.app
Make a folder in your external SDcard and name it as dload
Place the update.app in that dload folder.
You can dload method 2 ways.
method 1
switch off your phone
press and hold volume up, volume down and power button all together
Once you see EMUI on your screen release your fingers from the phone.
method 2
open your dialer
type *#*#2846579#*#*
select - software upgrade - > SD card upgrade
that's it.
Once you are done. You will be on C900BXX build number. Then you need to dload another firmware. And which firmware you need to flash is based on your phone region and model. Is your phone previous firmware L29C185BXX ? if yes then you have to flash L29C185B180 or B192 according to your model. This is really important. Please share your complete build number.
Once you succeed in these steps then we can discuss how to move forward and what to flash next.
Hope you find this information useful and hope you succeed.
Please don't forget to click on :good::good::good::good::good::good::good: on my posts.
Click to expand...
Click to collapse
The region is Australia
Build number before this superb update was nxtl29c18b200
Now build number is NRD90 test-keys
Not that im being picky or selfish perhaps but is there a stable firmware which has low power consumption, themes work, better operation performance?
By the way, both of the above mentioned methods don't work. I got an exlamation mark and a message saying update doesn't exist after only 5% of updating

NRD test keys to Stock
ubermorgan said:
The region is Australia
Build number before this superb update was nxtl29c18b200
Now build number is NRD90 test-keys
Not that im being picky or selfish perhaps but is there a stable firmware which has low power consumption, themes work, better operation performance?
Click to expand...
Click to collapse
So you have NXT-L29C185B200 is that correct? you can check this in settings - > about -> build number
you are not in nougat so please do NOT use the file in my previous post. (that should be used only if you are in nougat)
At the moment you are in marshmallow EMUI 4.0
If you have unlocked bootloader and TWRP installed then flash L29C185B180 (stock firmware)
Link to that firmware - > http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1076/g104/v51422/f1/full/update.zip
For unlocking, installing TWRP you can use SRK tools. I hope you have SRK tools, if not you can get it from this thread
https://forum.xda-developers.com/mate-8/development/tool-srk-tool-huawei-t3369797
and from this thread you can find how to use SRK tools to unlock and install TWRP.
https://forum.xda-developers.com/mate-8/general/vdo-guide-how-to-srk-tool-huawei-unlock-t3409707
There is a video tutorial on how to do this.
Link to the thread where you can find all Stock firmwares is here
https://forum.xda-developers.com/mate-8/general/huawei-mate-8-stock-firmware-official-t3391727
For flashing the firmware
1) Factory reset
2) Format DATA
3) Flash the zip file from the above link.
Android Nougat is Android 7.0 version. and the corresponding firmware's start with L29C185B5XX
First let us get rid of that NRD test keys then you can your phone can be updated to latest firmware easily. I will explain you in detail once you succeed in this step. Don't worry about errors.
Hope you succeed.
Don't forget to :good::good::good::good::good:

Samavb said:
So you have NXT-L29C185B200 is that correct? you can check this in settings - > about -> build number
you are not in nougat so please do NOT use the file in my previous post. (that should be used only if you are in nougat)
At the moment you are in marshmallow EMUI 4.0
If you have unlocked bootloader and TWRP installed then flash L29C185B180 (stock firmware)
Link to that firmware - > http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1076/g104/v51422/f1/full/update.zip
For unlocking, installing TWRP you can use SRK tools. I hope you have SRK tools, if not you can get it from this thread
https://forum.xda-developers.com/mate-8/development/tool-srk-tool-huawei-t3369797
and from this thread you can find how to use SRK tools to unlock and install TWRP.
https://forum.xda-developers.com/mate-8/general/vdo-guide-how-to-srk-tool-huawei-unlock-t3409707
There is a video tutorial on how to do this.
Link to the thread where you can find all Stock firmwares is here
https://forum.xda-developers.com/mate-8/general/huawei-mate-8-stock-firmware-official-t3391727
For flashing the firmware
1) Factory reset
2) Format DATA
3) Flash the zip file from the above link.
Android Nougat is Android 7.0 version. and the corresponding firmware's start with L29C185B5XX
First let us get rid of that NRD test keys then you can your phone can be updated to latest firmware easily. I will explain you in detail once you succeed in this step. Don't worry about errors.
Hope you succeed.
Don't forget to :good::good::good::good::good:
Click to expand...
Click to collapse
Emui is 5
Build number is NRD90M test keys
Android version is 7

Before NRD test keys
ubermorgan said:
Emui is 5
Build number is NRD90M test keys
Android version is 7
Click to expand...
Click to collapse
I am sorry I should have been more specific. I meant before NRD test keys, your build number was NXT-L29C185B200 ? (C185 is region specific) C432 is for Europe.
And now you have EMUI 5.0? then you can use the rollback package.
Here is the link
http://consumer.huawei.com/sg/mobile...g.htm?id=91647
I thought you were in marshmallow so I suggested you not to use it. But if you are in Android 7.0 (Nougat) then you can use the rollback package.
This rollback package will downgrade your phone back to Marshmallow and then build number might say C900BXX. It should get rid of that NRD test keys.
And after that you have to flash the stock firmware using dload method
Link to that firmware - > [url]http://update.hicloud.com:8180/TDS/d...ull/update.zip[/url]
Correct link - > http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1076/g104/v52952/f1/full/update.zip
Then you can update to any latest firmware. There are many ways to do this.
Please don't forget to click on :good::good::good::good::good::good::good: on my posts. It takes time, patience & lot of hardwork to type these posts. Not only on my posts but even on posts by other people who is helping you and giving you information

Samavb said:
I am sorry I should have been more specific. I meant before NRD test keys, your build number was NXT-L29C185B200 ? (C185 is region specific) C432 is for Europe.
And now you have EMUI 5.0? then you can use the rollback package.
Here is the link
http://consumer.huawei.com/sg/mobile...g.htm?id=91647
I thought you were in marshmallow so I suggested you not to use it. But if you are in Android 7.0 (Nougat) then you can use the rollback package.
This rollback package will downgrade your phone back to Marshmallow and then build number might say C900BXX. It should get rid of that NRD test keys.
And after that you have to flash the stock firmware using dload method
Link to that firmware - > http://update.hicloud.com:8180/TDS/d...ull/update.zip
Then you can update to any latest firmware. There are many ways to do this.
Please don't forget to click on :good::good::good::good::good::good::good: on my posts. It takes time, patience & lot of hardwork to type these posts. Not only on my posts but even on posts by other people who is helping you and giving you information
Click to expand...
Click to collapse
i've tried the update.app. I get incompatability message and it also says to try the correct update package. I keep getting error 404 on your links.

Rollback package
ubermorgan said:
i've tried the update.app. I get incompatability message and it also says to try the correct update package. I keep getting error 404 on your links.
Click to expand...
Click to collapse
If your Mate 8 was L29C185BXX before, then you can try this.
Device: Huawei Mate 8
Model:*NXT-L29
Rollback Build: NXT-LXXC185B500
Android Transition: v7.0 Nougat →*v6.x Marshmallow
EMUI Transition: v5.0 → v4.0
Status: Official
Type: Rollback (transition) firmware
File Name:*HUAWEI_Mate_8_Rollback_Package_NXT-L29_From Android7.0 EMUI5.0 to Android6.0 EMUI4.0_C185B500.zip
http://download-c.huawei.com/download/downloadCenter?downloadId=91643&version=358294&siteCode=kwen
The link I gave you in my previous post was from this thread. You can check for firmware from this thread.
https://forum.xda-developers.com/mate-8/general/huawei-mate-8-stock-firmware-official-t3391727
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1076/g104/v52952/f1/full/update.zip
Please don't forget to click on :good::good::good::good::good::good::good::good::good::good::good: on my posts.

Samavb said:
If your Mate 8 was L29C185BXX before, then you can try this.
Device: Huawei Mate 8
Model:*NXT-L29
Rollback Build: NXT-LXXC185B500
Android Transition: v7.0 Nougat →*v6.x Marshmallow
EMUI Transition: v5.0 → v4.0
Status: Official
Type: Rollback (transition) firmware
File Name:*HUAWEI_Mate_8_Rollback_Package_NXT-L29_From Android7.0 EMUI5.0 to Android6.0 EMUI4.0_C185B500.zip
http://download-c.huawei.com/download/downloadCenter?downloadId=91643&version=358294&siteCode=kwen
The link I gave you in my previous post was from this thread. You can check for firmware from this thread.
https://forum.xda-developers.com/mate-8/general/huawei-mate-8-stock-firmware-official-t3391727
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1076/g104/v52952/f1/full/update.zip
Please don't forget to click on :good::good::good::good::good::good::good::good::good::good::good: on my posts.
Click to expand...
Click to collapse
All good. I had help from danywalkert too though. Thanks to both of you really. Back on b200, emui 4, android 6. Now i guess i need an insecure boot image for this build number so i can root the phone again. Obtaining boot loader code now.

ubermorgan said:
All good. I had help from danywalkert too though. Thanks to both of you really. Back on b200, emui 4, android 6. Now i guess i need an insecure boot image for this build number so i can root the phone again. Obtaining boot loader code now.
Click to expand...
Click to collapse
You can check for your self. I have spent lot of time, energy and given you lot of information in writing not one but many posts.
:good::good::good::good::good::good::good:

I have NXT-L09-AC346B150 firmware installed on mate 8 Australian model.
Android 6 EMUI 4.03.
How to get nougat update.
Please help me.
Thanks

ketulharini said:
I have NXT-L09-AC346B150 firmware installed on mate 8 Australian model.
Android 6 EMUI 4.03.
How to get nougat update.
Please help me.
Thanks
Click to expand...
Click to collapse
Bro, you can download the firmware using firmware finder..you can install it from play store..then choose your model and region. hope this will help you.
Edit: Sorry i just checked your latest firmware is what you're using right now..sorry bro..i think you can debranding the phone then flash new nougat firmware..you can choose either europe, asia or middle east for the region. there are tons of thread to do this..

i do a rollback but build number get c900 instead of c605 of my region. original insrtuction PDF speak about a file called SDupdate_Package.tar.gz someone know about this? Im using a nxt-l09c605

[Guide] How to downgrade from Android Oreo 8.0 to 7.0 (Non-rooted)

How to downgrade a non-rooted S7 Edge from Android Oreo 8.0 to 7.0 and keeping your Knox 0x0!
So if some of you are looking for a 'how-to' guide, look no further! ​(I believe it works on your S7 too, but make sure you have downloaded the correct firmware)​
*IMPORTANT*
-I don't take ANY responsibility if you bricked your device during the flash!
-Follow the guide below before flashing your official firmware using Odin!
On the phone
-Sign-out any accounts on settings
-Have OEM-unlock & USB Debugging ON (developer options)
-*optional task, just in case* Screenshot your device information on the settings tab (IMEI, Baseband, Software Info, Model number)
-*optional task, just in case* Backup your device using Samsung SmartSwitch software
Things to download
-For this guide I used Odin v3.13.1 https://dl.sammobile.com/Odin3-v3.13.1.zip
-You can install the Samsung driver using SmartSwitch if your Win PC can't detect your Samsung phone (it should show on Device Manager > Modem > something like Samsung Modem)
-*READ* You can't flash back to version 6.0 now because of (Android Oreo 8.0 is using different version of boot-loader) but there are some late Android 7.0 with updated boot-loader, those are using boot-loader binary v2, so binary v1 it will be conflicted and won't work upon flash.
-*NOTE* Download the correct firmware of your phone model by following the baseband, that's why I recommended to take screenshots of your phone, you can search it on here https://www.sammobile.com/firmwares/, for mine, I've searched SM-G935F and BTU is my choice, the filtered results should be your correct firmware. But in my case I used (v7.0 in March 2018) because it has the binary boot-loader v2 with it (whatever it called, it's important otherwise it will not work which I've tried)
-*optional*, if you find sammobile download speed is way too slow* You can use https://updato.com/firmware-archive-select-model?q=SM-G935F&exact=1&r=&v=Nougat%28Android+7.0%29%2COreo%28Android+8.0.0%29&rpp=100, and basically look for the correct firmware which I have mentioned above.
-Extract your firmware onto a single folder, don't mess them up! (you should see something like AP_G935blahblahblah.md5, and you will need AP_, BL_, CP_, CSC_ for downgrading)
Follow the steps:
1. Now you have the correct firmware and Odin running on Admin right
2. On Odin you can add AP_, BL_, CP_ & CSC_ onto the correct selection, for example: https://i.imgur.com/DIB2d1S.png
3. Have your phone on Download mode, google it if you don't know how (make sure you followed the On the phone step first, it's very important)
4. Find a data USB cable and plug into USB2.0 port, make sure your phone appeared on Odin (you will see something like 0:[COM5])
5. On Odin (only Auto Reboot, F. Reset Time) is needed, it should be ticked by default.
6. Now you can safely click 'Start' on Odin.
7. DO NOT TOUCH YOUR PHONE in case your USB is loose which I had experience before.
8. Wait until it shows a green PASS! like this: https://i.imgur.com/FYosmx2.png
9. When see a blue screen with Erasing text on it, please wait until it reboot and hold (Volume UP + Home Button + Power Button) boot to recovery mode
10. Wipe cache partition, and data/factory reset then reboot system now
11. Wait for it to boot into your sweet sweet Android Nougat 7.0 (Late version)
12. Disable auto-update if you wish, mine was on auto-update so I had to pause it half-way
Hope you find this guide helpful, I tried to remember the steps on my head as I typed, (*sorry for the grammar if you find it hard to understand) and if you think I've missed something here, let me know! I would update the guide if any step is missing, just in case

Thanks
I'm guessing Knox counter wouldn't have incremented?

ZionMainframe said:
Thanks
I'm guessing Knox counter wouldn't have incremented?
Click to expand...
Click to collapse
No, not at all, if you are using the official firmware! Just follow the guide closely

Please help me downgrade from G935FXXS3ERHD to G935FXXU2DRAG.
I tried nand TWRP BL restore, BL and stock firmware flash in Odin. Nothing works.
Edit:
I found a solution, see: Original post

but there are some late Android 7.0 with updated boot-loader, those are using boot-loader binary v2
can you upload the bootloader?

How to know each android 7.0 bootloader is V2?

Now with the lattest update the binary changed to 3 then i cant downgrade to Nougat
(Im spanish)

Oreo to nougat
I have a s7 edge with the Data firmware Version 2018/09/18 8.0.0
PDA: G935FXXS3ERHD
CSC: G935FITV3ERG2
is it possible to downgrade from oreo to nougat? I have the battery that you always download

I tried but doesn't work
Hello dear!
I have a S7 edge SM-G935T and I tried to flash the last version of Nougat 7, but doesn't work. Odin don't let me finish the process. Maybe you wrote this thread before my cellphone received the last update of Oreo.
Do you have any solution in this case. I really appreciate it.
King regards, _/\_

Unfortunately the bootloader was updated in last updates, now the bootloader is version 3 as the phone said to me when i tried to flash the last version of Nougat.

i have stupid question but, i have R16NW.SM-G930FXXS3ERKE (oreo) but i think im not supposed download this(G930FXXS3ERKE) if i want downgrade to nougat but rather (G930FXXS2DRC3) because the first firmware i mentioned get me oreo again.... am I right??? i don t wont screw things up....

TheLoller221 said:
Unfortunately the bootloader was updated in last updates, now the bootloader is version 3 as the phone said to me when i tried to flash the last version of Nougat.
Click to expand...
Click to collapse
YES, the Guide is NOT working ANYMORE...

Does this work still

Help with G930A
Hello um I have a Samsung Galaxy S7 on AT&T (G939A) and it's on 8.0 (G930AUCS9CSB1). I've tried to root it but after some research I've come to find out I have to downgrade it to nougat to root it. But the problem is everytime I load a firmware it fails and I did more research I think it said something about the bootloader blocking it and the only way to downgrade the bootloader is downgrading the firmware which I can't do because of that cycle. Can someone please help me all I want to do is root install a custom recovery and a custom rom I love playing around with android tweaks but I can't get it because of this. I hope someone can help me please and thank you.

freshair4552 said:
I have a Samsung Galaxy S7 on AT&T (G939A) and it's on 8.0 (G930AUCS9CSB1)...
Can someone please help me all I want to do is root install a custom recovery and a custom rom...
Click to expand...
Click to collapse
Your bootloader cannot be unlocked due to it being Snapdragon, so unfortunately there is nothing you can do. Only Exynos variants can be modified.

Hello guys,I have a problem with my galaxy s7 sm-g935f(Exynos version).Few months ago I flashed my phone from android Nougat SEE CSC(South East Europe) to UK's Oreo BTU CSC.I'm curious is there any other way to downgrade it from oreo to nougat,otherwise than Odin.I tried flashing it a few times with the latest Odin version (3.13.3) and nougat SEE CSC(South East Europe) because that's my original CSC.Odin recognizes the device normally,but when i click start,it comes to setup connection and then FAIL.The reason I'm trying to downgrade is very poor battery life and heating,and the phone is very laggy.I even tried through Samsung Smart Switch Emergency software recovery but it seems that Samsung has restricted that option...please help if anyone has/had similar problem.Thank you!

Mine is Sprint g935pvpsbcta1
Am I screwed also?

Hi, I have
SM-G935F​and I can't find any nougat firmware with baseband of: G935FXXS8ETCA.. Can I flash any country / baseband 7.0 firmware? And will it improve the SOT? I'm currently getting upto 5 hours SOT.

lovetv said:
How to downgrade a non-rooted S7 Edge from Android Oreo 8.0 to 7.0 and keeping your Knox 0x0!
So if some of you are looking for a 'how-to' guide, look no further!
(I believe it works on your S7 too, but make sure you have downloaded the correct firmware)​
*IMPORTANT*
-I don't take ANY responsibility if you bricked your device during the flash!
-Follow the guide below before flashing your official firmware using Odin!
On the phone
-Sign-out any accounts on settings
-Have OEM-unlock & USB Debugging ON (developer options)
-*optional task, just in case* Screenshot your device information on the settings tab (IMEI, Baseband, Software Info, Model number)
-*optional task, just in case* Backup your device using Samsung SmartSwitch software
Things to download
-For this guide I used Odin v3.13.1 https://dl.sammobile.com/Odin3-v3.13.1.zip
-You can install the Samsung driver using SmartSwitch if your Win PC can't detect your Samsung phone (it should show on Device Manager > Modem > something like Samsung Modem)
-*READ* You can't flash back to version 6.0 now because of (Android Oreo 8.0 is using different version of boot-loader) but there are some late Android 7.0 with updated boot-loader, those are using boot-loader binary v2, so binary v1 it will be conflicted and won't work upon flash.
-*NOTE* Download the correct firmware of your phone model by following the baseband, that's why I recommended to take screenshots of your phone, you can search it on here https://www.sammobile.com/firmwares/, for mine, I've searched SM-G935F and BTU is my choice, the filtered results should be your correct firmware. But in my case I used (v7.0 in March 2018) because it has the binary boot-loader v2 with it (whatever it called, it's important otherwise it will not work which I've tried)
-*optional*, if you find sammobile download speed is way too slow* You can use https://updato.com/firmware-archive-select-model?q=SM-G935F&exact=1&r=&v=Nougat%28Android+7.0%29%2COreo%28Android+8.0.0%29&rpp=100, and basically look for the correct firmware which I have mentioned above.
-Extract your firmware onto a single folder, don't mess them up! (you should see something like AP_G935blahblahblah.md5, and you will need AP_, BL_, CP_, CSC_ for downgrading)
Follow the steps:
1. Now you have the correct firmware and Odin running on Admin right
2. On Odin you can add AP_, BL_, CP_ & CSC_ onto the correct selection, for example:
https://imgur.com/DIB2d1S
3. Have your phone on Download mode, google it if you don't know how (make sure you followed the On the phone step first, it's very important)
4. Find a data USB cable and plug into USB2.0 port, make sure your phone appeared on Odin (you will see something like 0:[COM5])
5. On Odin (only Auto Reboot, F. Reset Time) is needed, it should be ticked by default.
6. Now you can safely click 'Start' on Odin.
7. DO NOT TOUCH YOUR PHONE in case your USB is loose which I had experience before.
8. Wait until it shows a green PASS! like this:
https://imgur.com/FYosmx2
9. When see a blue screen with Erasing text on it, please wait until it reboot and hold (Volume UP + Home Button + Power Button) boot to recovery mode
10. Wipe cache partition, and data/factory reset then reboot system now
11. Wait for it to boot into your sweet sweet Android Nougat 7.0 (Late version)
12. Disable auto-update if you wish, mine was on auto-update so I had to pause it half-way
Hope you find this guide helpful, I tried to remember the steps on my head as I typed, (*sorry for the grammar if you find it hard to understand) and if you think I've missed something here, let me know! I would update the guide if any step is missing, just in case
Click to expand...
Click to collapse
I just wonder this solution will be work as well? my phone is s6 edge plus G928C.
And i want to downgrade to 5.1.1 or 6.0 because 7.0 was really terrible.

[Resolved] #Solved# Any Possible Solution to Downgrade Back to Nougat?

Hello all
Been a member here for some time now and have a perplexing issue.
I upgraded a Samsung Device SM T395 to OS Pie 9 and decided I didn't like it. (There are no other posts with help on this matter)
I kept the STOCK roms Nougat 7.1 and Oreo 8 and want to put Nougat 7.1 back on my device , but is proving difficult using ODIN 13.3.1 or any other version of Odin. The result is FAIL, that's using a combination of AP, CSC, CP and BL.
I managed to get Oreo 8 back on it, but want Nougat 7.1 original installed instead.
Can anyone tell me can ADB Fastboot be used to Flash a Stock Rom back on a Samsung Device or is Odin the only method?
I know there are other similar programs like QFIL and Qualcomm that I have used for the Mi Max brand devices.
The device was rooted with Nougat 7.1 originally and I have USB debug set and FRP / OEM lock off also. So there's no problem there.
The last resort (stupidly expensive idea :crying is for me to buy another exact device that has Nougat 7 installed when boxed up!
I don't see how upgrading to Pie 9 and then wanting to go back to the original factory installed rom is a big problem, can anyone explain?
Would a CUSTOM Nougat 7.1 rom work if installed via TWRP ?
I have also come across this COMBINATION Software https://samsungcombinationfile.com/samsung-sm-t395 that is supposed to allow the downgrading of Android software, but hasn't worked as I had been lead to believe.
https://combinationfirmware.com/combination-samsung-galaxy-tab-active/
Thanks for reading :good:

tsam19 said:
Hello all
Been a member here for some time now and have a perplexing issue.
I upgraded a Samsung Device SM T395 to OS Pie 9 and decided I didn't like it. (There are no other posts with help on this matter)
I kept the STOCK roms Nougat 7.1 and Oreo 8 and want to put Nougat 7.1 back on my device , but is proving difficult using ODIN 13.3.1 or any other version of Odin. The result is FAIL, that's using a combination of AP, CSC, CP and BL.
I managed to get Oreo 8 back on it, but want Nougat 7.1 original installed instead.
Can anyone tell me can ADB Fastboot be used to Flash a Stock Rom back on a Samsung Device or is Odin the only method?
I know there are other similar programs like QFIL and Qualcomm that I have used for the Mi Max brand devices.
The device was rooted with Nougat 7.1 originally and I have USB debug set and FRP / OEM lock off also. So there's no problem there.
The last resort (stupidly expensive idea :crying is for me to buy another exact device that has Nougat 7 installed when boxed up!
I don't see how upgrading to Pie 9 and then wanting to go back to the original factory installed rom is a big problem, can anyone explain?
Would a CUSTOM Nougat 7.1 rom work if installed via TWRP ?
I have also come across this COMBINATION Softwarehttps://samsungcombinationfile.com/samsung-sm-t395 that is supposed to allow the downgrading of Android software, but hasn't worked as I had been lead to believe.
https://combinationfirmware.com/combination-samsung-galaxy-tab-active/
Thanks for reading :good:
Click to expand...
Click to collapse
Samsung firmwares can not be downgraded. This is due to your bootloader version number. The bootloader version is the 5th number from the right of the firmware being downloaded. You can also check in setting - about phone - software info - baseband version ( 5th number from right). You can also tell bootloader number in download (Odin) mode with a line saying AP SWREV B:? : K? : S?. The B is your bootloader number.
Combination firmware works on the same principle in regards to bootloader numbers.
You can only flash the same or higher bootloaders version numbers.
Custom roms will work as long as the bootloader version number is the same ( or higher ) than what is on you phone.

spawnlives said:
Samsung firmwares can not be downgraded. This is due to your bootloader version number. The bootloader version is the 5th number from the right of the firmware being downloaded. You can also check in setting - about phone - software info - baseband version ( 5th number from right). You can also tell bootloader number in download (Odin) mode with a line saying AP SWREV B:? : K? : S?. The B is your bootloader number.
Combination firmware works on the same principle in regards to bootloader numbers.
You can only flash the same or higher bootloaders version numbers.
Custom roms will work as long as the bootloader version number is the same ( or higher ) than what is on you phone.
Click to expand...
Click to collapse
RE: spawnlives. Many thanks for clearing that up, I now understand. Like many other people I have been trying to mix and match BL files from different OS variants to try and trick the device into accepting the main Nougat AP file via Odin, but nothing works.
These NEW combination files suggest that it is possible to downgrade the BOOTLOADER files on certain devices. However I downloaded all that was available for my device and tried the lot and found the only ROM that would flash correctly and properly was the latest one with the Binary 4 Bootloader. The rest would not register in Odin due to MD5 binary error messages.
In download mode my device AP SWREV B:4 K:2 S:2. ( So I have binary 4 which was released in January 2019, I believe). and this must have been updated when I updated to OS 9 Pie , using all the AP, CSC , BL and CP files.
So as you say, the answer is either , look for a Nougat 7.1 rom with a BL file that has a BINARY 4 code. Or buy another device that has the original Nougat 7.1 installed, which is silly really. :laugh:
Thanks :good:

tsam19 said:
spawnlives said:
RE: spawnlives. Many thanks for clearing that up, I now understand. Like many other people I have been trying to mix and match BL files from different OS variants to try and trick the device into accepting the main Nougat AP file via Odin, but nothing works.
These NEW combination files suggest that it is possible to downgrade the BOOTLOADER files on certain devices. However I downloaded all that was available for my device and tried the lot and found the only ROM that would flash correctly and properly was the latest one with the Binary 4 Bootloader. The rest would not register in Odin due to MD5 binary error messages.
In download mode my device AP SWREV B:4 K:2 S:2. ( So I have binary 4 which was released in January 2019, I believe). and this must have been updated when I updated to OS 9 Pie , using all the AP, CSC , BL and CP files.
So as you say, the answer is either , look for a Nougat 7.1 rom with a BL file that has a BINARY 4 code. Or buy another device that has the original Nougat 7.1 installed, which is silly really. :laugh:
Thanks :good:[/
The best you can do is roll back to Oreo. A new phone running nougat would be the best choice. I don't use custom roms but they all seem to keep up to the latest version. I have not seen one that ( latest version ) that is nougat favoured.
Click to expand...
Click to collapse
Click to expand...
Click to collapse

spawnlives said:
tsam19 said:
spawnlives said:
RE: spawnlives. Many thanks for clearing that up, I now understand. Like many other people I have been trying to mix and match BL files from different OS variants to try and trick the device into accepting the main Nougat AP file via Odin, but nothing works.
These NEW combination files suggest that it is possible to downgrade the BOOTLOADER files on certain devices. However I downloaded all that was available for my device and tried the lot and found the only ROM that would flash correctly and properly was the latest one with the Binary 4 Bootloader. The rest would not register in Odin due to MD5 binary error messages.
In download mode my device AP SWREV B:4 K:2 S:2. ( So I have binary 4 which was released in January 2019, I believe). and this must have been updated when I updated to OS 9 Pie , using all the AP, CSC , BL and CP files.
So as you say, the answer is either , look for a Nougat 7.1 rom with a BL file that has a BINARY 4 code. Or buy another device that has the original Nougat 7.1 installed, which is silly really. :laugh:
Thanks :good:[/
The best you can do is roll back to Oreo. A new phone running nougat would be the best choice. I don't use custom roms but they all seem to keep up to the latest version. I have not seen one that ( latest version ) that is nougat favoured.
Click to expand...
Click to collapse
RE:spawnlives
Yes having researched the total list of softwares for the SM-T395 device, it seems the BL was updated to 4 on the 2nd roll out of Oreo 8.1. And having checked ALL stock Nougat variants, there was never any release of 7.1 with a bootloader binary 4!
I presume the BL Binary version is the 5 character from the right on the picture. (underlined red) :good:
It would make sense for Samsung to give the end user a choice what software they want, by keeping the BL version the same or giving a choice of BL selections to allow upgrade or downgrade.
Anyway, I rolled back to Oreo 8.1 with the binary 4 BL. And unfortunately there aren't many CUSTOM roms , nor a working TWRP for the Samsung Galaxy Active Tab2.
Thanks again :good:
Click to expand...
Click to collapse
Click to expand...
Click to collapse

tsam19 said:
spawnlives said:
tsam19 said:
RE:spawnlives
Yes having researched the total list of softwares for the SM-T395 device, it seems the BL was updated to 4 on the 2nd roll out of Oreo 8.1. And having checked ALL stock Nougat variants, there was never any release of 7.1 with a bootloader binary 4!
I presume the BL Binary version is the 5 character from the right on the picture. (underlined red) :good:
It would make sense for Samsung to give the end user a choice what software they want, by keeping the BL version the same or giving a choice of BL selections to allow upgrade or downgrade.
Anyway, I rolled back to Oreo 8.1 with the binary 4 BL. And unfortunately there aren't many CUSTOM roms , nor a working TWRP for the Samsung Galaxy Active Tab2.
Thanks again :good:
Click to expand...
Click to collapse
Yes the bootloader is 5th from the right.
I don't own a tab2. If no work twrp can be found and you want to at least have root try using magisk and used the patch root method.
Also to avoid possible upgrade turn off automatic updates in setting - software update as well as in developer option - auto update system.
Click to expand...
Click to collapse
Click to expand...
Click to collapse

spawnlives said:
tsam19 said:
spawnlives said:
Yes the bootloader is 5th from the right.
I don't own a tab2. If no work twrp can be found and you want to at least have root try using magisk and used the patch root method.
Also to avoid possible upgrade turn off automatic updates in setting - software update as well as in developer option - auto update system.
Click to expand...
Click to collapse
Have rooted the device no problem with magisk and patching the original boot img file. Then flashing patched boot img via odin. Causing device verification to need to reformat the device, resulting in correct root.
Once a device , this device is rooted, no official updates can be installed anyway. When you try to uodate software, a pop up shows as the device recognises the software has been modified.
As for TWRP there ISN'T any version of TWRP available for the Samsung Galaxy Active Tab2 (SM-T395). I have even emailed the makers , developers of TWRP why there isn't one in their device inventory list on their webpage.
So no TWRP, and NO custom roms either for this model.
My concern , was all about finding a valid , safe way to downgrade back to original Nougat 7.1. And until someone can produce a working image with a BL with binary 4. Then there's only one optiin and that is to buy another untampered device with Nougat 7.1 out of the box and leave it un updated. :good:
Thanks for replying.
Click to expand...
Click to collapse
Click to expand...
Click to collapse

tsam19 said:
Hello all
Been a member here for some time now and have a perplexing issue.
I upgraded a Samsung Device SM T395 to OS Pie 9 and decided I didn't like it. (There are no other posts with help on this matter)
I kept the STOCK roms Nougat 7.1 and Oreo 8 and want to put Nougat 7.1 back on my device , but is proving difficult using ODIN 13.3.1 or any other version of Odin. The result is FAIL, that's using a combination of AP, CSC, CP and BL.
I managed to get Oreo 8 back on it, but want Nougat 7.1 original installed instead.
Can anyone tell me can ADB Fastboot be used to Flash a Stock Rom back on a Samsung Device or is Odin the only method?
I know there are other similar programs like QFIL and Qualcomm that I have used for the Mi Max brand devices.
The device was rooted with Nougat 7.1 originally and I have USB debug set and FRP / OEM lock off also. So there's no problem there.
The last resort (stupidly expensive idea :crying is for me to buy another exact device that has Nougat 7 installed when boxed up!
I don't see how upgrading to Pie 9 and then wanting to go back to the original factory installed rom is a big problem, can anyone explain?
Would a CUSTOM Nougat 7.1 rom work if installed via TWRP ?
I have also come across this COMBINATION Software https://samsungcombinationfile.com/samsung-sm-t395 that is supposed to allow the downgrading of Android software, but hasn't worked as I had been lead to believe.
https://combinationfirmware.com/combination-samsung-galaxy-tab-active/
Thanks for reading :good:
Click to expand...
Click to collapse
To answer your question of how is downgrading such a big problem, it is due to security reasons, to keep your device as secure as possible with the newest available software and the latest security updates.
Sent from my SM-S767VL using Tapatalk

Please suggestions for downgrading to Android 10

Hi everyone, about two weeks ago I upgraded my OP7Pro to the OS12, that's the GM1913_11_H.30 build version.
In the forums I found some confusing info about what version is (i e. I don't know if this us a MP2 version) and how to downgrade to a better OS of this phone version (whether or not it is enough to download the firmware and just flash it through Local Install from the phone).
As the OS12 version is presenting issues about VoLTE and mobile data deactivation during the calls, I'd like to install the old 10.0.10 OS version, as it corresponds to the 10.3.7 Global/India version that looks like the most stable as many users claim..
However, I do not know how to rollback with no issues and no roots.
Please tell me the most reliable way to do that.
Many thanks!!!

chose your model phone and download it
Index of /list/Unbrick_Tools
1-unzip the file
2- turn off the phone
3- run msm tool
4- press volume up + down for 5 seconds
5- plug the cable to your phone
6- Once the msmtool has recognized your phone, press the start button.
Note : This operation will reset your data

yassine2217 said:
chose your model phone and download it
Index of /list/Unbrick_Tools
1-unzip the file
2- turn off the phone
3- run msm tool
4- press volume up + down for 5 seconds
5- plug the cable to your phone
6- Once the msmtool has recognized your phone, press the start button.
Note : This operation will reset your data
Click to expand...
Click to collapse
Many thanks for your info!!
Can I flash the OS10 version directly from OS12 with no installation of the Os11?

umby75 said:
Many thanks for your info!!
Can I flash the OS10 version directly from OS12 with no installation of the Os11?
Click to expand...
Click to collapse
yes you can juste chose the right os for your model phone if you are in europe than chose EU_GM21BA/
Index of /list/Unbrick_Tools/OnePlus_7_Pro

umby75 said:
Many thanks for your info!!
However, I discovered that my carrier doesn't support the VoLTE of my phone and I'm thinking to buy another with 5G feature and VoLTE enabled with my carrier...
Click to expand...
Click to collapse
yassine2217 said:
yes you can juste chose the right os for your model phone if you are in europe than chose EU_GM21BA/
Index of /list/Unbrick_Tools/OnePlus_7_Pro
Click to expand...
Click to collapse
Ok, thanks my friend. Elsewhere told me that there could be issues related to the Security patch level going backwards so much. What do you think? Are there real risks?

yassine2217 said:
yes you can juste chose the right os for your model phone if you are in europe than chose EU_GM21BA/
Index of /list/Unbrick_Tools/OnePlus_7_Pro
Click to expand...
Click to collapse
perhaps