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

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lovetv

lovetv

Member
Mar 6, 2010
35
7
London
AT&T Galaxy S7 Edge
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 :)
 

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U

Ubimo

Senior Member
Dec 22, 2011
1,653
821
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
 
Last edited:
islamyaseen

islamyaseen

Senior Member
Jun 17, 2014
87
11
36
cairo
but there are some late Android 7.0 with updated boot-loader, those are using boot-loader binary v2

can you upload the bootloader?
 
M

Mikybrian

New member
Oct 24, 2018
2
0
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
 
R

regab364936

New member
Nov 28, 2013
2
0
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, :) _/\_
 
T

TheLoller221

Member
Dec 5, 2014
14
2
Italy
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.
 
W

win3y3

New member
Dec 9, 2018
1
0
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....
 
F

freshair4552

New member
Aug 19, 2019
1
0
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.
 
SteveMurphy

SteveMurphy

Inactive Recognized Contributor
Apr 22, 2012
1,659
2,706
Atlanta
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.
 
A

android addicted99

New member
Feb 18, 2014
4
0
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!
 
Last edited:
orangzeb

orangzeb

Senior Member
Oct 12, 2010
618
80
40
Lahore
Samsung Galaxy S7 Edge
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.
 
iskender4444

iskender4444

Member
Mar 6, 2016
46
6
Nokia 9 PureView
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.
 
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    lovetv
    lovetv
    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 :)
    View
    1
    eriktirador
    eriktirador
    Now with the lattest update the binary changed to 3 then i cant downgrade to Nougat


    (Im spanish)
    View
    1
    H
    hakom
    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... :(
    View

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