yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Releases are named after PDA version

https://updato.com/firmware-archive-select-model?record=396E8AA2065411E99F15FA163EE8F90B

CSC is CRL1 (it should work)
[Samsung Galaxy S8+ Guides, News, & Discussion] tarunanna:
But the bootloader version is not matching. Mine is showing as G955U1UES5CRL2 and in the link given is 4 (G955FOXM4CRL1). Is it Ok?
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
It need not match every time (especially for CSC).. just give it a try. Have a back up and restore stock rom if it doesn't work.
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Hello bro

CRL3 pda is out yes

But as much as i know about sideloading or updating through recovery, the ins csc you need should have a CRL3 update

I had BRD2 update installed on phkne and i tried flashing BRD1 csc didn't work but BRD2 csc worked

I've given a try to this method already

File signature verification fails if you have a lower update

But still whats in trying

And i suggest you to flash the non branded stock firmware rather than sprint

I'm using it with almost no bloatware

The apps inside red mark are stock apps

Enjoy
[Samsung Galaxy S8+ Guides, News, & Discussion] tarunanna:
Hi,

I have downloaded the G955FOXM4CRL1 firmware and extracted the files.

Current Firmware: Sprint S8 plus unlocked with USA firmware (XAA)

Bootloader version: G955U1UES5CRL2

CSC Version: G955U1OYM5CRL2

Baseband Version: G955U1UES5CRL2

Indian Firmaware:

PDA/AP Version: G955FXXU4CRL3

CSC Version: G955FOXM4CRL1

MODEM/CP Version: G955FXXU4CRKB

New Files(India) to flash:

AP_G955FXXU4CRL3_CL14902807_QB20910878_REV00_user_low_ship_meta.tar.md5

BL_G955FXXU4CRL3_CL14902807_QB20910878_REV00_user_low_ship.tar.md5

CP_G955FXXU4CRKB_CP11271984_CL14842004_QB20752006_REV00_user_low_ship.tar.md5

CSC_OXM_G955FOXM4CRL1_CL14902807_QB20895102_REV00_user_low_ship.tar.md5

HOME_CSC_OXM_G955FOXM4CRL1_CL14902807_QB20895102_REV00_user_low_ship.tar.md5

Can you please confirm if the above files are correct? If yes, do I need to follow the steps from first post and from which step as I don't have any combination file?

Thank You
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
First extract CSC/OMC file from exynos csc and try to sideload..

If that doesn't work follow all steps from post 1.

Here is your combination file https://xdaforums.com/galaxy-s8/development/combination-files-bit-5-g950uu1-g955uu1-t3816112

Second link is for BL 5 G955U
[Samsung Galaxy S8+ Guides, News, & Discussion] tarunanna:
Can you plz let know how to extract the CSC/OMC file from exynos csc? Did you mean Step 3 (INS OMC for s8+) of the first post and if yes then how to side load it using adb?

Sorry, I am new to all this.
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Check the youtube link on first post on how to extract
[Samsung Galaxy S8+ Guides, News, & Discussion] tarunanna:
Already checked. Not able to download OMC_extract.zip as google drive link is not working. Plz share the new link. Also share the exynos csc to extract the csc/omc.

Thank You.
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
You can simply use 7zip to extract the csc oym first

Then use some img extractor to extract the cache.img file

Google it

Or just wait for nimms to reply

He'll surely post new links for the file
[Samsung Galaxy S8+ Guides, News, & Discussion] mayanknshah:
Have read the first post multiple times... But want to confirm before I start.

In step 2 and step 17 --- stock firmware needs to be flashed.

Is that correct ?

Appreciate the help. Tx
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
https://drive.google.com/open?id=1-Bgdadcp2mKdKsjruijrNXWKU1Ck5JwK

SAMSUNG S8 G950U1 bl5 CRL1 DECEMBER 2018 UPDATE FOR INS CSC WORKING
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
I've updated the first post with the file link (omc extract)
[Samsung Galaxy S8+ Guides, News, & Discussion] johnsmith0123:
Jio on smasung note 9 UK model

I have Note 9 and can't get VoLTE to work. Have tried and flashed Indian firmware. when I look at software it still shows service provider as BTU not INS.

Is there a way to get it so the service provider is INS so I can use JIO sim

Many thanks

https://samdb.org/download/Galaxy__/SZsgN/INS/N960FXXS2ARL4/N960FOXM2ARK2/
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Do a factory reset with Indian Sim inside... might work.
[Samsung Galaxy S8+ Guides, News, & Discussion] johnsmith0123:
I did factory reset with Jio sim inside done it 3 times

Is there another CSC file wich I can flash?

this is the file I have used 3 times with factory reset

AP_N960FXXS2ARL4_CL14366801_QB20927266_REV00_user_low_ship_meta.tar

BL_N960FXXS2ARL4_CL14366801_QB20927266_REV00_user_low_ship.tar

CP_N960FXXU2ARL2_CP11352558_CL14366801_QB20913375_REV00_user_low_ship.tar

CSC_OMC_OXM_N960FOXM2ARK2_CL14366801_QB20490073_REV00_user_low_ship.tar

when the phone start it always comes up with United Kingdom English option first.

Many thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Use *#272*your-imei# in dialpad (without last 2digits of your imei number)

As OXM csc-omc code contains indian csc in it

Then look if there's an option as "ins"

If there is tap on it and let the phone to reset
[Samsung Galaxy S8+ Guides, News, & Discussion] johnsmith0123:
Not working.

Invalid code

Here is what i have used

*#272*3594430998250#

Many thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Include 15 digits in imei not 13.. some have extra 2 digits in the last.. so he was asking you to ignore them. Try with 15

OXM csc you are flashing has INS built in.. but based on device code, it defaults to BTU. (Ideally it should change with the sim though)
[Samsung Galaxy S8+ Guides, News, & Discussion] johnsmith0123:
I did try with 13 and 15 digits IMEI number. Comes with connections problem or invalid MMI code

Many thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Hey

Try checking for imei using *#06#

If anything comes up by itself without tapping on the dial button then you are good to go

Or i guess you've messed up with the csc's

Go to play store download phone info Samsung

Swap to second tile and check if your csc details are coming up

You can post the screenshot here

Use es explorer or any third party file explorer

Then go to system and check if csc or omc folder is available if yes then inside one of those you should be able to see many sub folders like inu btu slk npl there you gotta check kf "ins" is available

Do post the screenshots please
[Samsung Galaxy S8+ Guides, News, & Discussion] johnsmith0123:
IMEI numbers comes up fine without pressing enter

I have tried file explorer from play store but can't see system anywhere.

Where is it and which file explore should I use

Where is the system file locate

Link to screen shot

---------- Post added at 10:27 AM ---------- Previous post was at 10:00 AM ----------

[/COLOR]

IMEI numbers comes up fine without pressing enter

I have tried file explorer from play store but can't see system anywhere.

Where is it and which file explore should I use

Where is the system file located

Looks like only CSC code installed is BTU

Link to screen shot

[URL="https://ibb.co/jfX1kwc"]https://ibb.co/jfX1kwc
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
System folder/

It's in the root folder of your unaccessible storage

Download es explorer

Go to internal storage then at upper left corner there will be a backslash sign / tap on it twice

Then navigate to system folder

Or WhatsApp at 7889629342 (getting late notifications here)
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
I guess you have flashed a firmware?

Type the exact phone model and firmware you flashed here
[Samsung Galaxy S8+ Guides, News, & Discussion] johnsmith0123:
Here is what I have downloaded and flashed

Model No. Samsung Note 9 SM-N960F duel sim

https://samdb.org/download/Galaxy__/SZsgN/INS/N960FXXS2ARL4/N960FOXM2ARK2/

Many thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] bondaru18:
So, all work fine but one quesstion! Update are not avabile, ok understand put manualy with odin,but how?
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Use these screenshots as reference

to check if your omc folder contains multiple csc's or not

In my case it's csc

But in yours it will be omc
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Download latest updates from updato.com or samfirm

And flash them manually in odin

Simple :)
[Samsung Galaxy S8+ Guides, News, & Discussion] johnsmith0123:
I have downloaded Indian firmware but it doesn't work.

When i get back to uk, will try again as don't have enough daily allowances to do anything big

Let you know how I get on.

Is there a way to put the phone back in original firmware!

I think it's possible with Samsung switch with serial no and IMEI Number in download mode.

Many thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Isn't this your stock firmware which came with your phone?

Or you flashed an indian version ?

Were you able to flash indian version?

Use patched odin

Or prince comsy to flash
[Samsung Galaxy S8+ Guides, News, & Discussion] johnsmith0123:
I don't have the csc or omc folder

Many thanks

---------- Post added at 09:38 AM ---------- Previous post was at 09:32 AM ----------

Stock rom was UK as phone was bought in UK and wanted to change it to Indian one so can use Jio sim without the app

Use Odin for flashing. Looks like it left the indian CSC file out

It worked on my Samsung S7 edge, just by changing the Rom

Many thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] Shrek Sardu:
I got this, just one question,

Doing this will I get to use Indian Samsung Pay ?
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Hello

Sorry for late reply

Don't get the notifications

Text at whatsapp +91 788 962 9342

---------- Post added at 01:57 PM ---------- Previous post was at 01:56 PM ----------
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
If it doesn't work, install India specific apps and try.

Spay framework https://drive.google.com/file/d/141M4ULhcgb_JmS9OQ-v97MH1r37dUGhT/view?usp=drivesdk

And

Spay app https://drive.google.com/file/d/1nfQbUwOGAfvPdyLFQaM9OqDH-34taEWA/view?usp=drivesdk
[Samsung Galaxy S8+ Guides, News, & Discussion] Shrek Sardu:
Thank you, will check and update..
[Samsung Galaxy S8+ Guides, News, & Discussion] RiddlerAryan:
Hi, I have a Galaxy Note 8 SM-N950U T Mobile which is carrier unlocked. Now Im in india and I want to use Jio VoLTE. My Firmware is N950USUQ5CRK1. Im New to android. Can I flash with the same method ?
[Samsung Galaxy S8+ Guides, News, & Discussion] logan36:
Samsung Galaxy Note 5 N920A (AT&T)

Hi,

I have Samsung Galaxy Note 5 SM-N920A with Andriod nougat 7.0 (which U.S with AT&T). So basically i'm back to india. Now i want to use jio network sim card which only supports VoLTE.

I will post my questions in order, because since days i have been doing research and found nothing helpful.

1. I'm trying to use Jio network, which requires VoLTE, any patch or fix available?

2. Since i couldn't find patch tried another variant Rom which brings me to a problem of Bootloader by AT&T. Any way to unlock bootloader?

3. Now since i cannot find unlock bootloader i tried to go for root. Here goes with more issue there is no root. (Available if downgrade but would be stuck on some 5.1.1 also no way of downgrading). Any way to root?

4. Since no root i tried with many setting change at APN, *#*#4346#*#* (VoLTE wont get enabled), and so on. Nothing VoLTE shows up in settings. Any better option?

5. Wanted call recording since Jio 4G app is VoIP based call recording apps wont work with that. Any better suggestion if using Jio 4G Calling app with recording?

Please help...
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Yes follow the first post.. read well and understand it before you proceed. First time flashers may not find it easy.
[Samsung Galaxy S8+ Guides, News, & Discussion] RiddlerAryan:
Im doing it for the first time. I have one more doubt. In STEP 2 you have mentioned to flsh with stock firmware. My model is N950U. So should i flash with N950U or should i use N950U1 or XAA ? Since N950U1 doesnt come with bloatwares, shall i flash with it in Step 2
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Hello

Read the post carefully 10 times first

And download this

It is the latest android 7 build

https://www.sammobile.com/firmwares/galaxy-note5/SM-N920G/INS/download/N920GDDS5CRH1/232797/

This is the indian version of note 5 N920G with indian csc

The thing you'll need to do is extract the csc from it

link to the extraction video by nimms

[youtube]giD7nP4Oue4[/youtube]

Watch it carefully

Then sideload the extracted csc on your phone (google it)

Or you can use an external sdcard to apply update from recovery.

I won't explain much just read the post

And first of all dial *#1234#

And post the popup codes here since there was no android 8 update for note 5 ,if you have the latest version of android 7 ,you would want to downgrade one version to be able to flash indian csc
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Yes.. go with U1

After flashing combination firmware, it's sometimes tricky to boot to OS or recovery.

Chances of bricking is very less but proceed at your own risk.
[Samsung Galaxy S8+ Guides, News, & Discussion] logan36:
Samsung Galaxy Note 5 N920A (AT&T)

Thanks a lot emad, been very helpful and patience.

Followed the entire tutorial carefully and step by step, been successfully able to setup VoLTE. Haven't noticed any large errors as of now. Will keep posted.

My Device was Samsung Galaxy Note 5 SM-N920A (AT&T).

Version : Andriod Nougat 7.0

Firmware : N920AUCS4EQD1

Used CSC (INS) : N920GODD3CQC7

Obtained from Indian firmware : N920GDDS3CQD1
[Samsung Galaxy S8+ Guides, News, & Discussion] RiddlerAryan:
What combination ROM should I use for N950U1UES5CSA1 ?

Will I be able to update android without loosing VoLTE inf uture?
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
You'll get your answers if you read the thread... (for both questions)

This is BL5 combination rom https://mega.nz/#!stJU2Kxa!T7o3JcU9UoHpQeSDv6qyYkK6ZJqHsEkSxNeo17i7xwA already linked on first post.
[Samsung Galaxy S8+ Guides, News, & Discussion] MalharB:
I doon't see option for full customisation after selecting csc, only option I see is install.
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Read 14th item on first post.. carefully. You should get that option after you click install, not along with install
[Samsung Galaxy S8+ Guides, News, & Discussion] ranbee9575:
VoLTE(Jio India) on Canadian SM-G965W S9+ Snapdragon

Please help me.

Jio VoLTE is not working on my S9+.

Incoming and outgoing calls doesn't works at all.

Operating System--- Andriod PIE

Janauary Security Patch

I have to use "Jio 4G Voice" application , along with keeping mobile data and location on, to make calls and to receive calls.

but it sucks lot of battery and is inconvinient to use.

I request you to give some solution.
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Sorry, this method doesn't work on s9 and later models.. they switched from OMC format to OMD.
[Samsung Galaxy S8+ Guides, News, & Discussion] bikker20:
Hi i have a galaxy s8+ usa , model is G955U1 , bootloader is G955U1UES5CSB2 , can you tell me which files to choose im so confused. Please help me thank you !
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
This is your combination file (factory binary) g955u1:

https://drive.google.com/uc?export=download&id=1vKab6XuaJrALrLS-YenTyy9GwSvbu1KX

Extract indian csc from this(android 9) g955fd:

https://updato.com/firmware-archive-select-model?record=9A2A706F3A2411E99F15FA163EE8F90B

And this is your stock rom with last android 8 build g955u1 :

https://updato.com/firmware-archive-select-model?record=2E9D6D89409411E99F15FA163EE8F90B
[Samsung Galaxy S8+ Guides, News, & Discussion] bikker20:
Thank you for that , everything done , got INS in status , but still no volte enable , im using Vodafone and other mobiles im getting Volte, is vodafone volte some other steps than jio?
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Download phone info

Open and swap to second tile and send screenshot here
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Can you please upload the extracted ins csc and post the link here please?
[Samsung Galaxy S8+ Guides, News, & Discussion] bikker20:
Here's the screenshot , i used the sec_omc.zip provided in the first post of this thread the main one..
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
Did you run the code

Echo "INS" .....

Or just type *#272*yourIMEI#

This will make a pop up of csc's then select ins and let it reset
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Vodafone might not have started VoLTE when the file was made.. extract the latest zip from the Indian stock rom (the file link is given by emadhmid)

First post has a YouTube video link on how to do it.
[Samsung Galaxy S8+ Guides, News, & Discussion] bikker20:
INS is already selected.
[Samsung Galaxy S8+ Guides, News, & Discussion] bikker20:
were you able to get VOlte on VOdafone?
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
If you don't want to extract latest omc zip yourself, use the s8 one that's a bit recent (Dec 2018). S8 files work on s8 plus too.

With old files, you won't get VoLTE

https://xdaforums.com/galaxy-s8+/how-to/how-to-volte-jio-india-carrier-usa-t3659238/post78756219
[Samsung Galaxy S8+ Guides, News, & Discussion] MalharB:
What I did.950U1 Flashed CSC zip in safestrap and deleted OMC folder. And everything works fine.
[Samsung Galaxy S8+ Guides, News, & Discussion] bikker20:
Extracted the latest omc from the Indian firmware jan 19 , still Vodafone does not gives VOLTE :(

here's the latest OMC for S8+ in case any one needs.

https://drive.google.com/file/d/1HQ6Y0wdKlS-ZFRJD-UVNcHp6NiBZxPn_/view?usp=sharing

---------- Post added at 09:50 PM ---------- Previous post was at 09:41 PM ----------

Did that too ! but no VOLTE :( , instead of LTE symbol i just get 4G and no VOLTE enable button in settings.
[Samsung Galaxy S8+ Guides, News, & Discussion] kunaalsehgal:
Even I have the same G955U1UES5CSB2 .it was verizon earlier. I tried with these 3 files but I still cannot get the pass. it shows

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<ID:0/004> Odin engine v(ID:3.1301)..

<ID:0/004> File analysis..

<ID:0/004> Total Binary size: 6087 M

<ID:0/004> SetupConnection..

<OSM> All threads completed. (succeed 0 / failed 1)

everytime.

Can someone please help.

Thankyou
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Which files?

Did you follow the first post in full?
[Samsung Galaxy S8+ Guides, News, & Discussion] kunaalsehgal:
I can't go pass the 2nd step. This happens while I am trying to flash the stock as mentioned in the 2nd step.

I am not yet allowed to attach links in my comments.

I used the links on page 33 no-#326 of this thread for the same model. That didn't work so downloaded another from sammobile and updato, they didn't work either.
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
You just need to use another odin

Use patched odin

See if that works
[Samsung Galaxy S8+ Guides, News, & Discussion] prayag00:
unable to sideload sec_omc.zip "signature verfication failed"

please suggest Combination and OMC file for galaxy s8 SM - G950U1

BASEBAND VERSION G950U1UES5CRL2

or for 5CSB2
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Combination : https://shell.boxwares.com/Download.aspx?L=7499

OMC as listed on fist post. Or you can extract the latest version yourself from Indian stock ROM (link to instruction video is posted on first post)
[Samsung Galaxy S8+ Guides, News, & Discussion] prayag00:
the issue persists still not able to install latest extracted sec_omc and problem is the same "signature verification failed " " verification of update failed" installation aborted ! tried it with SD card also but the problem is persisting.

do i need to flash stock firmware first from updato (G950UOYN4CRE9) ?
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
Try to use matching baseband files (you flashed bl 5 combinatio but stock seems to be BL4)

And upload the latest omc zip for others please
[Samsung Galaxy S8+ Guides, News, & Discussion] prayag00:
Actually i am currently using BL5 stock firmware and there is no problem in flashing the combination of BL5 but the problem is with sideloading SEC_OMC.ZIP and i guess the problem is the zip file gets modified on its own, may be during sideloading or while copying it to minimal adb folder or while extracting it.
[Samsung Galaxy S8+ Guides, News, & Discussion] miky144:
i am Stuck at Step 14. i am Unable to Find INS it is showing only XAA. How to solve this?
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
If you did step 12 properly.. you should get INS

Did you sideload properly?

You can load the zip on SD card and try "apply update from SD" too
[Samsung Galaxy S8+ Guides, News, & Discussion] Kulyash:
adb sideload signature verification failed

I have s8 g950u with at&t.

I installed fw given in first post for s8 with bootloader v4.

Then flashed combination with bootloader v4

When I am flashing sec omc given on first page with adb in recovery...it says verification failed.

Which file should I flash?
[Samsung Galaxy S8+ Guides, News, & Discussion] prayag00:
Try changing the destination of Minimal adb folder (move it out of your WINDOWS drive) and then copy sec omc to it and then sideload it.

Let me know if it works !

---------- Post added at 01:22 PM ---------- Previous post was at 01:00 PM ----------

you might not have sideloaded sec_omc.zip properly ! try again and please inform what kind errors you are facing !
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
The omc file linked on first post is BL5 version. Please give a try with BL5 rom files
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
If you don't want to upgrade to BL5, check video linked in first post to extract BL4 omc file yourself.
[Samsung Galaxy S8+ Guides, News, & Discussion] Kulyash:
sec_omc signature verification failed

I switched to bootloader v5 with these files-

SM-G950U_1_20180808155253_mdb3dnxp88_fac.zip

and

COMBINATION_FA70_G950USQU5ARG4_BoxWares.tar.zip

still sec_omc.zip on the first post is showing signature verification failed.

---------- Post added at 12:43 AM ---------- Previous post was at 12:35 AM ----------

sir in your screenshots you are using bootloader v3.

did someone get it working on bootloader v5?

Also can I flash g950U1 firmware with bootloader v5 on my G950U?
[Samsung Galaxy S8+ Guides, News, & Discussion] Kulyash:
sec_omc signature verification failed
[Samsung Galaxy S8+ Guides, News, & Discussion] amrtplp:
I successfully unlocked Volte on my s8 plus (smg955u). Thanks to nimms for posting such accurate instructions. I m currently on oreo.

How can I update to pie while still keeping the unlocked Volte?
[Samsung Galaxy S8+ Guides, News, & Discussion] Kulyash:
sideload sec_omc

Have you got success with sideloading sec_omc.zip on your S8?

If yes please guide cause i am facing same issue.
[Samsung Galaxy S8+ Guides, News, & Discussion] emadhamid:
You need a higher version of csc file to sideload

It is showing signature verification failed because the csc you're using is older than the one you currently have in the phone
[Samsung Galaxy S8+ Guides, News, & Discussion] nimms:
I think the s8 file i linked was uploaded by you. Do you mind checking md5 of the file you have and the file you uploaded? May be it got corrupt while getting uploaded? Or their download was bad.

Or they have to extract newer file themselves.