I Successfully Changed the CSC of My SM-N986B/DS (Exynos)

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*Detection*

Senior Member
Dec 5, 2011
10,513
2,851
Durham
How did you do it man?
I got this error when I tried with your steps.

Device model is SM-N986B

CSC version : N986BOXM1CTL5
Android version : 11
Build date : Tue Dec 22 19:01:00 KST 2020
Country : MALAYSIA
Sales code : XME

Do I have to downgrade?

I am in SouthEast Europe,what CSC do you suggest to use?

Well if you're running 11 and it tells you 11 is not supported then.... ;)

Just use the Google dialer trick, install Google dialer, set as default and enter this code

*#*#27262826#*#*

Change to whatever CSC you want, backup first as it will wipe the phone
 

andiii_7

Senior Member
May 10, 2013
217
53
Tirana
Well if you're running 11 and it tells you 11 is not supported then.... ;)

Just use the Google dialer trick, install Google dialer, set as default and enter this code

*#*#27262826#*#*

Change to whatever CSC you want, backup first as it will wipe the phone
Already tried that man but nothing shows, codes dissapear right after presing #

Can I downgrade from android 11 to 10?
 

*Detection*

Senior Member
Dec 5, 2011
10,513
2,851
Durham
Already tried that man but nothing shows, codes dissapear right after presing #

Can I downgrade from android 11 to 10?

Think I read someone saying you need to factory reset if it doesn't work after upgrading to 11 then it should work

Long as BL bit is the same you should be able to, not tried

N986BXXU1CTL5 << BL v.1
 

dr.Gioia

New member
Oct 2, 2012
1
0
Como
Hello everyone I have a n986b I used the guide and replaced csc from vgr vodafone greece to itv italy where I live. Samsung pay now works and updates too. 5G no longer works. I downgraded from 11 to 10 and reset csc vgr, 5G is not back. I put back csc itv, reflash latest firmware 11itv but 5G doesn't work. In my area there is 5g, my sim on another 5G mobile phone works. Do you have any solution to fix it? I searched the forum but found nothing.
With activity launcher entering the hidden menu if I block the network on NR the network disappears.
Thanks.
 

andiii_7

Senior Member
May 10, 2013
217
53
Tirana
Think I read someone saying you need to factory reset if it doesn't work after upgrading to 11 then it should work

Long as BL bit is the same you should be able to, not tried

N986BXXU1CTL5 << BL v.1
I managed to downgrade to Android10 using the INS July Firmware provided on the first post. I changed CSC with google dialer and now it is SEE/SEE,SEE/XME

Unfortunatelly when I check for software update nothing comes up :) which means I could be stuck to Android 10 or there is something else I should do?

p.s EDIT: however I changes CSC to BTU (or DBT) and updates resumed :) so I guess it was something related only to the CSC i had chosen (SEE).
 
Last edited:
May 4, 2010
12
0
So...

If i install a DBT version, with the last update .... and change csc to Brazil (ZTO) ...will Samsung pay work normally?

And about updates?

Will check for ZTO or DBT on next time?

Tks
 

jirka607

Senior Member
  • Aug 9, 2010
    1,847
    180
    Alšovice
    Xiaomi Mi 11
    Xiaomi Mi 11 Ultra
    There is no need to downgrade to July to change CSC.

    Here is free and easy metod to change active CSC:

    Install Google Dialer and dial via it *#*#27262826#*#*, choose desired CSC and press (Install), phone will be reseted.
    If there is no CSC that you want, download desired whole firmware via sammobile and flash via ODIN, then again with Google Dialer to change the active CSC.
    This metod works on Android 10, not working on Android 11, but if Bootloader is still same (for SM-N986B it is still "1"
    Android 11 N986BXXU1CTL5, Android 10: N986BXXU1ATJ1 ) - so it is possible to downgrade to Android 10 and change CSC via Google Dialer, then OTA to Android 11 and all works.
    Personally I recommend (and use for all my phones) THL CSC - it have build in Call recorrder, Samsung Pay works and 5G works.
    Knox not triggered.
    Happy new 2️⃣0️⃣2️⃣1️⃣ :)

    Is RCS working for you in Samsung messages? I had to enable it using alliance shield and still it shows only sms when writing message to someone who uses RCS.
    Otherwise THL is best csc it has callerID,recording but thankfully it doesn't have the useless places tab in dialer.
     
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    ChoSmile

    Member
    Feb 9, 2011
    41
    30
    Sofia
    Is RCS working for you in Samsung messages? I had to enable it using alliance shield and still it shows only sms when writing message to someone who uses RCS.
    Otherwise THL is best csc it has callerID,recording but thankfully it doesn't have the useless places tab in dialer.
    I use RCS with Goolge Messages app.I try Samsung Messages on Samsung S21U XXV and Samsung N20U THL - but on both did not able to send RCS or other phones (with Google Messages and RCS) did not see them as RCS capable. So continue to use Google Messages.

    THL will stop Samsung Pay on the end of 2021, other thing will work.
    Call recording and Samsung Pay - XXV (Vietnam), INS or INU (India)
     

    jirka607

    Senior Member
  • Aug 9, 2010
    1,847
    180
    Alšovice
    Xiaomi Mi 11
    Xiaomi Mi 11 Ultra
    I use RCS with Goolge Messages app.I try Samsung Messages on Samsung S21U XXV and Samsung N20U THL - but on both did not able to send RCS or other phones (with Google Messages and RCS) did not see them as RCS capable. So continue to use Google Messages.

    THL will stop Samsung Pay on the end of 2021, other thing will work.
    Call recording and Samsung Pay - XXV (Vietnam), INS or INU (India)
    Im using INS it feels better than THL somehow
     

    sivuha0101

    Member
    May 21, 2014
    34
    7
    Good afternoon,
    Currently I'm on the april update Android 11, with the H3G software. i want to switch the csc to btu to remove the three bloatware and boot screen. Could someone help me?
    For people who can't switch between csc in the same mult csc pack. OXM multi csc pack contains all the european generic and network branded firmware (csc) so if You are at H3G (part of OXM multi pack), and flash it with BTU (part of OXM multi pack) the H3G will stay. What you need to do is to flash it with different multi csc pack (just see what packs are available for your model), try to flash it with Brazil, csc ZTO, it's part of multi pack OWO, then flash it back with OXM multi pack, and it should switch to some generic csc, then if you instert your sim card it should ask you if you want to customize your phone to the inserted sim card and it will change your csc to the one you want.
     

    Nizam_A

    Senior Member
    Nov 24, 2020
    67
    7
    Samsung Galaxy Note 20 Ultra
    For people who can't switch between csc in the same mult csc pack. OXM multi csc pack contains all the european generic and network branded firmware (csc) so if You are at H3G (part of OXM multi pack), and flash it with BTU (part of OXM multi pack) the H3G will stay. What you need to do is to flash it with different multi csc pack (just see what packs are available for your model), try to flash it with Brazil, csc ZTO, it's part of multi pack OWO, then flash it back with OXM multi pack, and it should switch to some generic csc, then if you instert your sim card it should ask you if you want to customize your phone to the inserted sim card and it will change your csc to the one you want.
    thanks so much i did just as you said. the 3 logo boot screens gone and the apps that come pre installed. i chose to flash dbt software as i heard they get installs a bit quicker. will i get ota updates now? btw it didnt ask me about customising my phone after using a uk vodafone sim, it did install the my vodafone app tho automatically
     

    sivuha0101

    Member
    May 21, 2014
    34
    7
    thanks so much i did just as you said. the 3 logo boot screens gone and the apps that come pre installed. i chose to flash dbt software as i heard they get installs a bit quicker. will i get ota updates now? btw it didnt ask me about customising my phone after using a uk vodafone sim, it did install the my vodafone app tho automatically
    What is the first CSC in Network Provider info in your software settings? You will get OTA updates
     

    Nizam_A

    Senior Member
    Nov 24, 2020
    67
    7
    Samsung Galaxy Note 20 Ultra
    What is the first CSC in Network Provider info in your software settings? You will get OTA updates
    Screenshot_20210419-103118_Settings.jpg
     

    sivuha0101

    Member
    May 21, 2014
    34
    7
    Looks good, but in case you want to get btu you would have to factory reset your phone, insert the english simcard in, wait around 10 seconds for the window to pop out and that would reset your phone to BTU customization
     

    Nizam_A

    Senior Member
    Nov 24, 2020
    67
    7
    Samsung Galaxy Note 20 Ultra
    Stick with DBT, you will get the same updates as BTU, the onlly difference is the domain language which you cna obviously change .
    Thanks. I'll see when the may update rolls around. I've been using DBT or btu software via Odin for a while. It's kinda long tho so I hope it's fixed now. There's no more 3 bloatware. The only place it says 3 or H3G is in that column of service provider. Know why?
     

    sivuha0101

    Member
    May 21, 2014
    34
    7
    The last CSC is always the original CSC that the phone was sold with. You can only change it by roooting the phone, but it doesn't affect the phone in any way, it's more for samsung repair centre etc.
     
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    • 1
      The last CSC is always the original CSC that the phone was sold with. You can only change it by roooting the phone, but it doesn't affect the phone in any way, it's more for samsung repair centre etc.
    • 3
      Hey everyone

      Not sure if this has already been asked...

      I have a phone with November patch will I still be be able to downgrade to the July patch??

      I don't want to trigger Knox.

      There is no need to downgrade to July to change CSC.

      Here is free and easy metod to change active CSC:

      Install Google Dialer and dial via it *#*#27262826#*#*, choose desired CSC and press (Install), phone will be reseted.
      If there is no CSC that you want, download desired whole firmware via sammobile and flash via ODIN, then again with Google Dialer to change the active CSC.
      This metod works on Android 10, not working on Android 11, but if Bootloader is still same (for SM-N986B it is still "1"
      Android 11 N986BXXU1CTL5, Android 10: N986BXXU1ATJ1 ) - so it is possible to downgrade to Android 10 and change CSC via Google Dialer, then OTA to Android 11 and all works.
      Personally I recommend (and use for all my phones) THL CSC - it have build in Call recorrder, Samsung Pay works and 5G works.
      Knox not triggered.
      Happy new 2️⃣0️⃣2️⃣1️⃣ :)
      2
      Yes KOO was the one I also thought was the unbranded CSC


      Good luck! :good:



      OMG !! IT WORKED !

      The phone rebooted with no operator logos and no extra operator apps, just basic apps from Samsung and Google.

      Now the Service provider SW ver. is - KOO/KOO/KOO/LUC

      Thank you very much ! I had almost lost hope, thanks to your simple steps and also for the link of the credit seller, he sent the login data within a few minutes.

      Now I can fully enjoy this great phone.

      I hope to be useful to the community in the future, as well as the community has been helpful to me.

      Thanks again :D
      2
      I bought the device didint read too much and i t0hough that simply flaahing with odin XEO will do the trick as it was on Notr8 but nope. So now i just need to wait for possibility to change csc android 11 ;(

      No need to wait.
      Download Android 10 THL, flash wiht ODIN, change with Google Dialer and update will be automatic to 11 via OTA.
      1
      WARNING: THIS PROCESS WILL RESET YOUR PHONE TO FACTORY STATE. BACKUP YOUR FILES BEFORE YOU PROCEED. YOU MAY DOWNLOAD SAMSUNG SMART SWITCH HERE

      I finally got my CSC back!

      What I needed:

      1. Official July Security Firmware - Because the CSC Changer will only work if you have a firmware lower than the August Security Firmware
      Since I wanted the XTC firmware back, I downloaded the OXM firmware with multi-CSC N986BXXU1ATGI file here Warning, very slow download speed.
      Since the security policy for both firmware hasn't changed yet, I was able to downgrade my firmware, from the current one on my phone N986BXXU1ATH3 to the older one N986BXXU1ATGI
      @Aresnalove confirmed that he was able to downgrade from the September patch without issues.

      You can use ANY one of these firmware. They're basically 'OXM with multi CSC
      MEGA Links:
      XTC-N986BXXU1ATGI
      INS-N986BXXU1ATGI. Big Thanks to @keieva
      GDRive Link:
      XTC-N986BXXU1ATGI

      2. CSC Changer App (Windows Installer). Here are additional links containing a compressed format that you can choose from if the first link is not working: 2nd LINK and 3rd LINK. (Disable your antivirus before downloading as it's being tagged as a virus.)

      3. Odin 3.14.4 to flash the firmware. (Instructions here, thanks to @henklbr)

      What I did:
      • Removed my SIM cards from my phone.
      • Disabled my antivirus before installing the CSC App changer in Windows.
      • Disconnected my PC from the internet.
      • Flashed the N986BXXU1ATGI firmware and proceeded with the phone setup without inserting my SIM cards and connecting to the internet.
      • Installed the CSC Changer and followed this video - Your phone will update the Store App. You need to connect to the internet temporarily. As soon as the update is
      complete, disconnect. The 'theme' should show "Try Now" to work. If you continue to be connected to the internet, it will show "Buy" and it will not work.
      • I selected the 'Android 10' option in the Legal setting (You will see 3, one for Android 8, Android 9 and Android 10)
      • After selecting my CSC and the phone restarted, I got my CSC back to XTC from DBT where I got stuck :D
      • I again flashed my phone to the latest firmware N986BXXU1ATH3.
      • Turned back on my PC's antivirus.
      • The *#272*IMEI# code works again on my phone on the latest XTC firmware, (see attachment for available CSC codes). Kindly get back and check if this code works after successfully changing your CSC.

      TIPS:
      • After changing to your choice of CSC, check first if the features that you want are there and working. This will give you another chance to change your CSC using the CSC App changer.
      • If you are satisfied with the results, you can then upgrade your phone to the latest Security patch by downloading the file for your phone using Frija and then flash with Odin.
      • Some prefer a full reset of their phone, others prefer to keep their files and settings. If you want to keep your files and settings use the HOME_CSC instead.

      CAVEAT: This process worked for me. Again, I would like to reiterate that I needed to downgrade my firmware to pre-August 1 Security Upgrade for the CSC app changer to work.



      This process will not trip Knox because you are flashing an official firmware and the CSC app did not affect Knox as well. OTA update works. Your chosen CSC will be retained even after an update - unless of course, you decided to change your CSC manually.

      I would like to thank @tribalfs for giving me an idea how I could change my CSC, specific for the Exynos version.
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