[Guide] (Oreo) Root Note8 (Exynos) + OEM Issue Fix + EFS Backup (Note8/S8/S8+)

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RouterRooter

Member
Nov 29, 2015
16
0
Hello BluePhnx, WOW! So I cannot root this phone?? I also just realized what Snapdragon and Exynos meant, I have rooted 2 Phones before in the past and the processor was not ever mentioned. My Note 8 has a Snapdragon processor, I have version N950USQS7DSL2 which is Android Version 9 (Pie), if I'm not mistaken. Can you please answer my initial question and please direct me to a link here on XDA where I could discuss with others who are in my situation. I have a feeling I'm out of place in this thread. Thanks again for your response and your help.
 

BluePhnx

Senior Member
Oct 12, 2014
722
355
Hello BluePhnx, WOW! So I cannot root this phone?? I also just realized what Snapdragon and Exynos meant, I have rooted 2 Phones before in the past and the processor was not ever mentioned. My Note 8 has a Snapdragon processor, I have version N950USQS7DSL2 which is Android Version 9 (Pie), if I'm not mistaken. Can you please answer my initial question and please direct me to a link here on XDA where I could discuss with others who are in my situation. I have a feeling I'm out of place in this thread. Thanks again for your response and your help.


Check this thread out:

https://forum.xda-developers.com/galaxy-note-8/development/root-t3942403

That thread is for safestrap that allows you to install a rooted android nougat on later on bootloader versions.

But you have to wait for a solution for bootloader ver "7" (N950USQS "7" DSL2) . No root yet for that bootloader!

According to that thread root is only available for android nougat!

Edit: Safestrap doesn't unlock your bootloader just gives you root. So no AOSP roms or custom kernels, just Samsung nougat rom with root.
 
Last edited:

kevinsunny

Member
Mar 13, 2016
30
3
i just need a bit of clarity

"N950F_root_OEM_issue_devices.zip" Is this necessary if I can see the OEM unlock option in developer setting? Im on Android 9.0. Also if not necessary. Can I just follow the first method and skip the OEM issue part? Im a noob.

---------- Post added at 05:37 AM ---------- Previous post was at 05:09 AM ----------

I'm a noob. Please help me understand if I Can root my note 8? I have OEM unlock option in my developer settings. And I'm on Feb 2020 security patch.

Android version 9
Baseband version N950FXXS9DTA1
Kernel version 4.4.111-16983991
#1 Thu Feb 6 KST 2020
Build number PPRI .180610.011.N950FXXS9DTA5
Knox version Knox 3.2.1 Knox API level 27 TIMA 3.3.O
Android security patch level 1 February 2020
 

SSeb76

New member
Mar 5, 2020
1
0
Hi
Guys any idea how to instal new rom avoiding phone wipe
Phone is rooted but month after month Samsung realise a security patch and when i upload it to the phone using odin with home csc there is a failures
 

k.draw

New member
Mar 18, 2020
3
0
Hai.
I'm new in this community.
what makes me want to know more about rooting, because I have a device Galaxy note8 and I want to recoved my deleted pic and videos only. and I used software dr.fone to recover my data! unfortunatley it is requesting from me to root the device so it can recover the files! and with reading, I tried to make root by kingo root but failed!

then I tried to follow youtube video titled: The Easiest & Safest Way To ROOT Any Android Phone (2020 WORKS)

unfortunatley I cound't make it boot with custom recovery TWR! it didn't work!

then I reviwed the steps in this topic! all of them lead to wipe and format the data! :crying:

is there any method to recover my personal data!!! :crying::crying::crying:
 

kevinsunny

Member
Mar 13, 2016
30
3
Hai.
I'm new in this community.
what makes me want to know more about rooting, because I have a device Galaxy note8 and I want to recoved my deleted pic and videos only. and I used software dr.fone to recover my data! unfortunatley it is requesting from me to root the device so it can recover the files! and with reading, I tried to make root by kingo root but failed!

then I tried to follow youtube video titled: The Easiest & Safest Way To ROOT Any Android Phone (2020 WORKS)

unfortunatley I cound't make it boot with custom recovery TWR! it didn't work!

then I reviwed the steps in this topic! all of them lead to wipe and format the data! :crying:

is there any method to recover my personal data!!! :crying::crying::crying:
I think if it isn't rooted already, when you root you will have to wipe the entire data. If already rooted you have options to recover the data deleted. But I'm not sure. Await response from a senior member.

---------- Post added at 09:55 AM ---------- Previous post was at 09:52 AM ----------

Hi
Guys any idea how to instal new rom avoiding phone wipe
Phone is rooted but month after month Samsung realise a security patch and when i upload it to the phone using odin with home csc there is a failures
As the dev mentioned. If you don't change the CSC, you can dirty flash the rom. The rom contains the recent security patch.
 

Tarar

Senior Member
Aug 10, 2014
79
3
Islamabad
how do i restore the efs backup that i made using this tool. My imei has been changed to 000000000. i am familiar with adb but can't quite make sense of that "of" section. what am i supposed to put in that. i am on android 10 SM_G965F.
 

akthktd

New member
May 7, 2013
3
0
32
Kerala \ Calicut
Hello all, my N950F galaxy note 8 with N950FXXUDDTH1 after 1 year of rooting lost IMEI suddenly of no reason.
I had efs, modem backup from N950FXXUDDTH1.

Mistakenly I odin flashed the device to N950FXXSFDUD1 and i got a new update which I installed too. I believe my bootloader got updated to the latest and there is no success to get back IMEI after restoring efs ( backed up from old PDA N950FXXUDDTH1).

is there any solution to restore old PDA based EFS, MODEM to my device with new PDA, N950FXXSFDUD1 ?
 

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    [Guide] How to Root Note8 + EFS Backup



    Index of post

    • Must Read - You must read this to know about side effects of rooting device.
    • OEM Issue - OEM unlock option is must to root device, know about it
    • PART1: Recommended method to root N8 (exynos)
    • PART2: Other possible methods to root N8 (exynos) - Use this as knowledge base, we still recommend method said in PART1.
    • PART3:EFS Backup - You must backup EFS as soon as you root the device and make a copy to other safe place too
    .


    Must Read :
    READ THIS BEFORE ROOTING DEVICE

    - Any of below said method to root will trip knox and void warranty forever.
    - Root process needs wipe data so make backup of important data (including Internal Device storage) before proceed.
    - As of now you will lose Samsung Pay and Secure folder forever if you root once, even unrooting won't help. (hope in future we can get it working on tripped knox device). Also you may not able to run some banking apps, but for that there are some workaround like Magisk Hide or SU hide, google it.
    - OTA likely won't work once you root device.
    - To unroot device completely, simply flash Samsung stock firmware, Remember, Unrooting won't revokes warranty nor you will be able to use Secure folder/Samsung Pay. Once rooted, these feature gone for you unless some magic happen in future and may find a way to use it.




    OEM issue
    OEM affected device - means OEM unlock option missing out of box and appears 7 days later. If you are uncertain about this, you can consider your device OEM affected .

    Workaround to get OEM unlock option if it is not available (Normally it appears after 7 days of clean install but this trick may bring it without 7 days waiting)

    - Flash latest stock firmware
    - Set clock 8 days prior to current date
    - Check for OTA update (check last check date is set to 8days prior from current)
    - Reboot
    - Set current date
    - Check for OTA update (now last check date should be current day
    - Check Developer option for OEM option




    PART1 : For Oreo & Pie

    ROOT Note8 (exynos) (Recommended method for all including have OEM issue )

    This method is most convenient and give most options in single pack, like root with magisk/SuperSU also it does patch OEM issue (losing OEM toggle on rooting device, follow below said guide to the letter to work it properly)




    How to Use

    1.Enable Developer Option (settings - about phone - Software information - Tap 7 times on build number to activate developer option in settings menu)
    2.Enable OEM Unlock from developer option (Read above for workaround if you don't have this option)
    3.Download and copy N950F_root_OEM_issue_devices.zip according Oreo/Pie to Ext SD card
    4.Download TWRP for N8
    5.Switch Off device
    6.Press Vol down + Bixby + Power to reboot to download mode, press volume up when asked to continue to download mode
    7Download Odin and open it, Disable 'Auto reboot' from option menu of Odin
    8.Select TWRP (tar image) with AP tab of Odin and Start
    9.Once Successfully flashed, you will see 'Passed' in Odin tab
    10.Disconnect device and hold Vol down + power till screen goes off, Now immediately press Vol Up + Bixby + Power to reboot to TWRP
    11.Select to allow modification
    12.From TWRP, Select WIPE menu - Then FORMAT DATA - You need to type 'yes' to perform wipe. WARNING : This will erase all data including Int SD storage from device
    13.Once format device completes, go back and select REBOOT' Menu and then - 'RECOVERY', This will reboot to TWRP again
    14.Now select Install and navigate path to Ext SD card - N950F_root_OEM_issue_devices.zip, you have copied earlier
    15.Once Magisk flash successfully, Reboot to System
    Open settings - Developer option - Look for OEM Unlock option. If it is there, it is safe to reboot device.
    Credits and Thanks goes to BlackMesa123 for this post for OEM patch script.

    Important Note for Pie - There will be OEM unlock option there in developer setting but it will be disabled and can not enabled, this is because of it is hacked. Just ignore it. You can not boot device with TWRP if it is really disabled. Also If magisk app may not appear then simply download Magisk_for_Pie.apk from below attachement and install as regular app.



    PART2 : (FOR OREO Only)

    ROOT Note8 (exynos) for devices that doesn't have OEM issue
    This method is actually for knowledge base purpose about all possible ways to root N950 (exynos), also to note that you shouldn't use this method if your device have OEM issue. We recommend all to use above said method for all in PART1


    Here is detailed guide about Root Galaxy Note8. Guide made in two sections, One who want root + Custom recovery and second Root without flashing custom recovery.


    1.Root with TWRP (Recommended method) You can root with SuperSU OR Magisk

    Root with TWRP is preferred method as it gives option to flash zip like mods,custom ROMs etc

    Root with SuperSU

    1.Enable Developer Option (settings - about phone - Software information - Tap 7 times on build number to activate developer option in settings menu)
    2.Enable OEM Unlock from developer option (Currently no workaround for those who doesn't have this option)
    3.Download SuperSU (I have used SuperSU 2.82 SR4) to Ext SD card. Here is Original thread to see if any update available.
    4.Download TWRP for N8
    5.Switch Off device
    6.Press Vol down + Bixby + Power to reboot to download mode, press volume up when asked to continue to download mode
    7.Download Odin and open it, Disable 'Auto reboot' from option menu of Odin
    8.Select TWRP (tar image) with AP tab of Odin and Start
    9.Once Successfully flashed, you will see 'Passed' in Odin tab
    10.Disconnect device and hold Vol down + power till screen goes off, Now immediately press Vol Up + Bixby + Power to reboot to TWRP
    11.Select to allow modification
    12.From TWRP, Select WIPE menu - Then FORMAT DATA - You need to type 'yes' to perform wipe. WARNING : This will erase all data including Int SD storage from device
    13.Once format device completes, go back and select REBOOT' Menu and then - 'RECOVERY', This will reboot to TWRP again
    14.Now select Install and navigate path to Ext SD card - SuperSU, you have copied earlier
    15.Once SuperSu flash successfully, Reboot to System

    Keep patience and allow device to boot, It may take time as we have formated data.

    Once device boot, you will have SuperSU in app drwer with working boot.

    ---------------------------------------------------------------------------------------------------------------------

    Root with Magisks


    1.Enable Developer Option (settings - about phone - Software information - Tap 7 times on build number to activate developer option in settings menu)
    2.Enable OEM Unlock from developer option (Currently no workaround for those who doesn't have this option)
    3.Download and copy latest Magisks zip to Ext SD card
    4.Download TWRP for N8
    5.Switch Off device
    6.Press Vol down + Bixby + Power to reboot to download mode, press volume up when asked to continue to download mode
    7.Download Odin and open it, Disable 'Auto reboot' from option menu of Odin
    8.Select TWRP (tar image) with AP tab of Odin and Start
    9.Once Successfully flashed, you will see 'Passed' in Odin tab
    10.Disconnect device and hold Vol down + power till screen goes off, Now immediately press Vol Up + Bixby + Power to reboot to TWRP
    11.Select to allow modification
    12.From TWRP, Select WIPE menu - Then FORMAT DATA - You need to type 'yes' to perform wipe. WARNING : This will erase all data including Int SD storage from device
    13.Once format device completes, go back and select REBOOT' Menu and then - 'RECOVERY', This will reboot to TWRP again
    14.Now select Install and navigate path to Ext SD card -Magisks zip, you have copied earlier
    15.Once Magisk flash successfully, Reboot to System

    Keep patience and allow device to boot, It may take time as we have formated data.

    2. Root with Stock Recovery
    This will give just root access and No custom recovery. (you can't flash custom ROM, mods zip with stock recovery but still can use FlashFire or similar.
    There are two ways, you can root with stock recovery
    1.CF Auto Root (superSU)
    1. Download CF Auto root package Thanks to @ChainFire and MobiFirmware
    2.Extract and read ReadMe.txt for details
    3.Enable Developer Option (settings - about phone - Software information - Tap 7 times on build number to activate developer option in settings menu)
    4.Enable OEM Unlock from developer option (Currently no workaround for those who doesn't have this option)
    5.Switch Off device
    6.Press Vol down + Bixby + Power to reboot to download mode, press volume up when asked to continue to download mode
    7.Download Odin and open it
    8.Select Image.tar.md5 (From you have download CF root package above) with AP tab of Odin and Start
    9.Once Successfully flashed, you will see 'Passed' in Odin tab
    Device will get Reboot with root access

    2.Magisk

    1.You need to have stock firmware, Extract boot.img file from that firmware with winzip or similar
    2.Install Latest Magisk Manager
    3.Open it and explore settings - Patched Boot Output format - select img.tar
    4.Now again from main page of Magisk Manager click Install - Install - Patch Boot Image File and patched the boot.img
    5.Copy patched_boot.img.tar to a PC from MagiskManager directory on Int Storage
    6.Enable Developer Option (settings - about phone - Software information - Tap 7 times on build number to activate developer option in settings menu)
    7.Enable OEM Unlock from developer option (Currently no workaround for those who doesn't have this option)
    8.Switch Off device
    6.Press Vol down + Bixby + Power to reboot to download mode, press volume up when asked to continue to download mode
    7.Download Odin and open it, Disable 'Auto reboot' from option menu of Odin and
    8.Select patched_image.tar (You copied as step 5 above) with AP tab of Odin and Start
    9.Once Successfully flashed, you will see 'Passed' in Odin tab
    10.The phone restarts and ask to reset to factory settings, This will erase all data from device
    11. Let reboot device and install Magisk manager again and open it. Now you will have root.
    12.You can install FlashFire and re flash Magisk zip again to have magisk module to work.



    PART3 :

    EFS Backup Tool Note8 /S8 /S8+



    This is simple EFS backup tool. We are very well knowing about what EFS is and why it is MUST to backup on every rooted device. If you don't know then Read post #3 for more Information

    You needs root access to use this tool otherwise app won't open..

    Location of stored file :

    Device storage/MyEFS
    If you unable to see backup, contact me with details of your device variant


    Difference between Free/Play store

    -Both version makes backup in same format and no difference in backup.
    -Pro Version always look for backup, if there is no backup then it will make one just after boot. Also it will make backup if your last backup is made on different ROM than existing. Also it will give warning if backup fails.
    -Pro version keeps all previous backup to MyEFSBackup folder (you can choose to make extra copy on Ext SD too) while XDA version overwrites previous one and you need to make manual copy if you want to have multiple copies.
    -Pro version have option to Restore with single click

    This tool using generic name of partition block and you can restore with simple adb shell

    dd if=/path of backup files/ of=/partition block according your device



    Download EFS Backup Tool :


    PlayStore version

    XDA version

    ChangeLog :

    1.0
    - Initial Release (4696)
    1.1 (2650)
    - S9/S9+ added to supported list
    - Fix probable issue with SuperSu and Magisk (16.4) on Oreo
    1.2
    - Compatible with latest magisk
    5
    What is EFS

    This part of the device contains some important and some basic info related to our device identity like Bluetooth MAC address, wireless devices MAC addresses, product code (also in the nv_data.bin) and the very main IMEI address (nv_data.bin), programming parameters for the device such as your account information (phone number, etc), data provisioning parameters, and a whole bunch of other things. So you can guess it's will be different for each device and one can't use others. In latest samsung device this information store in other partition so requires to make backup of that partition too.

    How it can corrupt :

    - Any bad flashing, mishandling system modification can cause this.
    - Also It can be corrupted by downgrading stock ROM. If you flash any old ROM on newer ROM it can corrupt EFS. Basically newer ROM believed to have new kernel that changes EFS data which older Modems can't read and results to fail in reading IMEI.

    Impact on device/How I know I have corrupted EFS

    When there is EFS partition is corrupted, device loses IMEI and due to this device can't gets connected to network. Baseband info also sometimes shows unknown.
    -Check your IMEI in setting / by dialling *#06# if it is null OR if it starts with 0049** then IMEI is generic and corrupted. In Normal case IMEI which you can see in device setting or dialing *#06# is exactly same you can see on bill/box/sticker under battery compartment
    -If you are unable to connect to network in spite of correct IMEI, chance are
    A. Your device is Locked to specific Network OR
    B. Your device is banned due to tempered IMEI
    -If your AP,CP,CSC all are correct and even you are getting error (unknown CSC XXX) on kies update, it may be due to corrupt Product code in EFS. Read This for detail.

    What care should i take
    Before flashing anything, first thing you should do is to make EFS backup. Every person who have rooted device should make EFS backup earliest and place it to safer place on PC and /Cloud.
    If you are on older ROM, make EFS backup on older ROM as well make another after upgrading ROM too.
    If you have already updated to newer ROM, make backup on current ROM.

    Exit "Permanent Safe Mode" This condition represent with loss of IMEI + yellow text box on homescreen with device info.here is Screenshot

    attachment.php


    Here is different method to remove it.

    Method1 :
    Open root explorer.
    Navigate to /efs/FactoryApp/
    Open "factorymode" file as Text and edit it:
    Change this:

    Code:
    OFF
    To:
    Code:
    ON

    Open "keystr" file as Text and edit it:
    Code:
    OFF
    To:

    Code:
    ON
    Reboot device.

    Method2:

    Open Terminal emulator
    Write the following:
    Code:
    su
    Then click enter. It will ask for super user permission, give it permissions.
    Write the following & click enter:
    Code:
    rm /efs/FactoryApp/keystr
    Write the following & click enter:

    Code:
    rm /efs/FactoryApp/factorymode
    Write the following & click enter:

    Code:
    echo -n ON >> /efs/FactoryApp/keystr
    Write the following & click enter:

    Code:
    echo -n ON >> /efs/FactoryApp/factorymode
    Write the following & click enter:

    Code:
    chown 1000.1000 /efs/FactoryApp/keystr
    Write the following & click enter:

    Code:
    chown 1000.1000 /efs/FactoryApp/factorymode
    Write the following & click enter:

    Code:
    chmod 0744 /efs/FactoryApp/keystr
    Write the following & click enter:

    Code:
    chmod 0744 /efs/FactoryApp/factorymode
    Reboot your device


    Method3

    Install attached safemode_exit apk as regular app. Open from drawer - Grant su permission - Reboot when asked.


    e:failed to mount /efs(invalid argument) error with bootloop

    This condition usually happens with using unsupported tool (usually from play store).

    To recover this, needs to use adb shell


    Code:
    adb shell
     mke2fs / dev/block/mmcblk0p[COLOR="Red"]x[/COLOR]
     mount-w-t ext4 / dev/block/mmcblk0p[COLOR="red"]x[/COLOR] / efs

    x means your device EFS partition number

    PS : It needs CWM and busybox installed.
    5
    samsung live chat:

    that device note 8 after registered also dose not support OEM unlock

    any idea?
    Samsung Live Chat is staffed by below average imbeciles. You might as well ask your dog.
    Wait 7-10 days after you first turned on the device then check in Developer Options for the OEM Unlock option.
    4
    Who have OEM unlock option appeared after 7 days and want to root device, Kindly use method from below said link and report back if that keeps OEM unlock option intact even after root
    https://forum.xda-developers.com/showpost.php?p=74763412&postcount=2350







    4
    I did exactly as stated but i'm stuck on the note 8 logo screen. Used to work on Oreo, but now on Pie something is missing. Is anyone having the same issue?
    Now I have root :)
    1. First of all it was root on my note on android 8. All was done as described by author of that theme, and has OEM unlocked.
    2. Then flash android 9 firmware. Boot to android.
    3. Enable DEVELOPER. Disable OEM unlock and NO REBOOT phone!!!, enable OEM unlock (that was done becauseTWRP flashed with - FAIL).
    4. Reboot to ODIN (download) mode.
    5. Flash TWRP with no reboot.
    6. Boot to TWRP. Format DATA as described, and reboot recovery.
    7. Flash that script-- "no-verity-opt-encrypt-6.0.zip" (sorry but i can`t post links, but google can find it at -- androidfilehost)
    -- Desided to check what i have - phone passed logo but was in bootloop
    8. Flash magisk-v18.1.
    After that phone begin to boot normaly and have ROOT.