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[Guide] - eSim Firmware Flash/ Odin Upgrade/ Flashing and N986U to N986U1 & Vice Versa

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radici

Senior Member
Jun 5, 2006
217
7
Bridgetown
Did everything...couldn't change...I give up. Will try after some time...Have came back to U1 XAA firmware.
Mine didn’t work either, I flashed from XAA/ATT U1 after factory reset and removing sim to XAA U1 again, then rebooted to download mode and flashed the full TMobile U version (with CSC not home CSC …even flashed userdata). Skipped through all I could in setup, didn’t connect to wifi, put back in my international sim. Still XAA, no tmb, esim was now present but grayed out and my model number was now U/DS. Problem is… then I could no longer see a data icon and had no connectivity. Rebooted… still the same. Had to flash back XAA U1.
 
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rjohnstone

Senior Member
Mine didn’t work either, I flashed from XAA/ATT U1 after factory reset and removing sim to XAA U1 again, then rebooted to download mode and flashed the full TMobile U version (with CSC not home CSC …even flashed userdata). Skipped through all I could in setup, didn’t connect to wifi, put back in my international sim. Still XAA, no tmb, esim was now present but grayed out and my model number was now U/DS. Problem is… then I could no longer see a data icon and had no connectivity. Rebooted… still the same. Had to flash back XAA U1.
You will not see TMB if you re not using a TMB SIM.
XAA devices will show XAA/XAA/<carrier code from SIM>
If you want to change to TMB, you'll need a TMB SIM. The firmware package you flash is irrelevant.
 

tommytep

Member
Jul 13, 2021
12
1
Just flashed with USERDATA, it still doesnt change Hahah. I think there is something stopping my phone to change its CSC
mine as well. keep flashing back and forth U1 and U dozen times with hints from any method that works but no luck. it seems that the lastest firmware (June update - which my phone has before flashing) has block esim permanently and no way to alter that.
 

tommytep

Member
Jul 13, 2021
12
1
Mine didn’t work either, I flashed from XAA/ATT U1 after factory reset and removing sim to XAA U1 again, then rebooted to download mode and flashed the full TMobile U version (with CSC not home CSC …even flashed userdata). Skipped through all I could in setup, didn’t connect to wifi, put back in my international sim. Still XAA, no tmb, esim was now present but grayed out and my model number was now U/DS. Problem is… then I could no longer see a data icon and had no connectivity. Rebooted… still the same. Had to flash back XAA U1.
yp, same here. on TMB it has IED greyed out, sim manager missing and cannot connect to mobile data. Have to stop trying now after dozen of flash and wait for new workaround to be discovered.
 

dadmi

Senior Member
Sep 15, 2012
75
11
yp, same here. on TMB it has IED greyed out, sim manager missing and cannot connect to mobile data. Have to stop trying now after dozen of flash and wait for new workaround to be discovered.
Was able convert U1 to TMob version yesterday and activated Tmobile esim with no issues. Firmware used was the one linked in the first post.

 

radici

Senior Member
Jun 5, 2006
217
7
Bridgetown
Was able convert U1 to TMob version yesterday and activated Tmobile esim with no issues. Firmware used was the one linked in the first post.

What method did you use? Factory reset with sim out then flash to U1 first then flash to U, run through setup and then install sim?
 
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dadmi

Senior Member
Sep 15, 2012
75
11
Interesting to see you flashed Home Csc instead of regular csc. Ideally you should not lose data when flashing home csc but user data flash must have caused you to lose your data and start fresh.
I took a backup and factory restored phone before doing these steps. This was with my cousin's phone and we wanted to keep the process simple while working on the phone remotely. When I did the same steps when tmobile released eSim with my phone, I had issues with keeping my data and had to flash home csc or user data (don't know which one) to make the phone boot up successfully.
 

jrapps

Member
Oct 24, 2010
33
19
Hi. I just got a brand new Galaxy Note20 5G SM-N981U1 that I want to flash with T-Mobile SW to get e-sim/dual sim capabilities. Since it is a brand new unlocked U1 out of the box, I have no data on the phone I need to worry about preserving. I also have a physical T-Mobile SIM (which will eventually convert to e-sim) and then a Verizon sim for the 2nd sim.

How do I tell if my phone is Bootloader 1 or 2, or does it not really matter? Here is the SW already loaded on the phone:

Build # 11/RP1A.200720.012.N981U1UEU2DUF2

CSC SAOMC_SM-981U1_OYM_XAA_RR_0016
XAA/XAA/XAA

Security Patch July 1, 2021

My plan was to put in the T-Mobile SIM, install ODIN on my PC, the download and install the latest SW from Frija for SM-N981U CSC TMB:

N981USQU2DUH2/N981UOYN2DUH2/N981USQU2DUH2

I assume I don't need to worry about selecting home_CSC or userdata since it is a brand new phone.

Am I missing anything?
 

warriorvibhu

Inactive Recognized Developer
Aug 28, 2007
1,419
327
Somewhere Amazing
HTC One (m7)
LG V10
Hi. I just got a brand new Galaxy Note20 5G SM-N981U1 that I want to flash with T-Mobile SW to get e-sim/dual sim capabilities. Since it is a brand new unlocked U1 out of the box, I have no data on the phone I need to worry about preserving. I also have a physical T-Mobile SIM (which will eventually convert to e-sim) and then a Verizon sim for the 2nd sim.

How do I tell if my phone is Bootloader 1 or 2, or does it not really matter? Here is the SW already loaded on the phone:

Build # 11/RP1A.200720.012.N981U1UEU2DUF2

CSC SAOMC_SM-981U1_OYM_XAA_RR_0016
XAA/XAA/XAA

Security Patch July 1, 2021

My plan was to put in the T-Mobile SIM, install ODIN on my PC, the download and install the latest SW from Frija for SM-N981U CSC TMB:

N981USQU2DUH2/N981UOYN2DUH2/N981USQU2DUH2

I assume I don't need to worry about selecting home_CSC or userdata since it is a brand new phone.

Am I missing anything?
You are not missing anything. N981USQU2DUH2, The highlighted number is what shows the bootloader number so check for software version on yours in the settings. You dont have to use home_csc, use regular csc. i suggest flashing even before you insert t mobile sim - Just flash the T-Mob firmware and then insert the sim after the flash.
In case the flashing/ conversion is not successful, flash with userdata of t-mob firmware.
 

jrapps

Member
Oct 24, 2010
33
19
So it worked and the phone appears to be working great, however I noticed that my service provider info is now listed as

TMB/TMB,TMB/XAA

Is that normal or OK?
 

nds4me

Member
Jul 5, 2010
7
1
Hi.
I got a new Galaxy unlocked Note20 5G SM-N981U1, I inserted my Tmobile sim and it is working fine, but I really want T-Mobile SW, can I just use Odin to flush the firmware for TMB , i found the following on sammobile.com
PDA:N986U1UES2DUH3
CSC:N986U1OYM2DUH3

My phone software now is :
One UI V.3.1
Baseband:N986U1UES2DUH3
Build: RP1A.200720.012.N986U1UES2DUH3
CSC: SAOMC_SM-986U1_OYM_TMB_RR_0012
TMB/TMB/XAA
Security Patch September 1, 2021
 
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warriorvibhu

Inactive Recognized Developer
Aug 28, 2007
1,419
327
Somewhere Amazing
HTC One (m7)
LG V10
Hi.
I got a new Galaxy unlocked Note20 5G SM-N981U1, I inserted my Tmobile sim and it is working fine, but I really want T-Mobile SW, can I just use Odin to flush the firmware for TMB , i found the following on sammobile.com
PDA:N986U1UES2DUH3
CSC:N986U1OYM2DUH3

My phone software now is :
One UI V.3.1
Baseband:N986U1UES2DUH3
Build: RP1A.200720.012.N986U1UES2DUH3
CSC: SAOMC_SM-986U1_OYM_TMB_RR_0012
TMB/TMB/XAA
Security Patch September 1, 2021
You should be fine. Just follow the instructions from post 1. You may lose data so be mentally prepared for your device to factory reset other than that your Knox and all would be fine, I saw your question on other thread. You can also use the firmware from the other thread where you posted the question instead of using Sam mobile.
 
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LukasVN

New member
Sep 24, 2021
4
1
I have used Odin to flash to N986USQU1CTL2 from kenji's post but failed. I want to upgrade my phone to Android 11 and my device info here. Please help.

Solved! I tried Odin 3.14.4 and succeeded.
Screenshot_20210924-124114_Settings.jpg
 
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  • 1
    I flashed from U1 to U
    AP>AP, BL>BL, CP>CP, Home CSC < CSC, no userdata.

    My version also shows TMB/TMB, TMB/XAA
    Build Number: SP1A.210812.016G998USQU4BUK7 (Android 12, One UI 4)
    I have all the tmobile features including RCS, eSIM, etc.

    My question is, will I still get OTA updates and will they be the carrier path OTA or the Unlocked path OTA from now on?
    You should get OTA and it would be carrier path OTA.
  • 5
    WARNING - Samsung has upgraded to Bootloader 2, if you are on bootloader 2 you can not flash U to U1 or U1 to U without losing data until a solution is found - Instructions are updated to get eSIM
    INTRODUCTION - Firstly sorry for posting this as this is common knowledge for many. I still see so many people asking the same questions again and again and i do want to help so decided to write a guide.
    If you have Odin Flashing questions please ask here. I have converted a device from U to U1 (just for fun) so i know this works, many other users have confirmed this too.
    SECTION1

    Pre-Requisites - PC / Laptop, USB Cable, Phone
    Switch on USB Debugging from Developer options. To turn on developer options go to Settings>>About Phone>>Software Information>> Then tap the build number 7 times - Developer options will appear at the bottom of Settings Menu.

    HOW TO - N986U to N986U1 and or Flash ATID or Flash Any Odin compatible ROM
    1. If you want to flash or update to One UI 3 Beta then Download the ATID Firmware here. (This point is old when people were on Android 10 not relevant now)

    1. For changing Carrier locked device to Unlocked Firmware (N986U to N986U1) Download the firmware for U1 from OTA Thread or by using Frija
    OR​
    1. For changing unlocked device to Carrier locked Firmware (N986U1 to N986U) Download the firmware for U from OTA Thread or by using Frija - This is usually being done to get eSIM Capability on your phone

    If you are Flashing One UI 3 Stable download the appropriate firmware. (This point is old when people were on Android 10 not relevant now)

    There are many resources for downloading firmware, there is a thread in the N20 Ultra forums, there are tools like Frija and SamFW and more, then there are various websites. Where you are downloading from is your outlook just ensure you download Odin compatible ROM.

    2. Download Patched Odin here
    3. Unpack/Unzip what you downloaded in Step 2 (Odin Compatible ROM) and put in a folder. Lets call the folder "Flash"
    4. Run Odin, click on BL, Browse to the "Flash" folder, add BL file from there, Do the same for AP (click on AP, Add AP file, this will take some time), Same for CP (click on CP, Add CP file)

    NOTE ATTENTION CAREFUL To get eSIM Capability on your phone if you are on bootloader version 2 please see step 5a and Skip Step 5
    5 . Click on CSC, Add the file with the name starting with Home_CSC). If you use Home_CSC your phone will not get formatted and data will remain Intact
    USERDATA Stays empty.
    5a. Do the same for CSC (click on CSC, Add the file with the name starting with CSC. This will format your phone and your phone will factory reset. You will lose your data and would need to setup your phone like it was new. USERDATA Stays empty.

    6. Now connect USB cable to your laptop (Only laptop and not the phone)>> Turn off your phone >> Press volume up and volume down keep them pressed and plug in the USB type C into your phone.
    7. You should be in download mode now, press volume up. In Odin you will see that phone is added.
    8. Press start in Odin. Wait for it to finish and let the phone restart (it will happen On its own).
    9. Done

    SECTION 2
    HOW TO - N986U or N986U1 Latest Security Patch or Firmware upgrade / downgrade
    1. Download the firmware for Corresponding device - For example if you are on SM-N986U1 then download for U1. If you are N986U locked to TMB, VZW, SPR etc etc download the firmware for U device and your Own CSC from OTA Thread or by using Frija or SamFirm tool.
    2. If downloaded using Frija or SamFirm Tool it will be in a compressed folder (ZIP). Extract the firmware files in a folder, lets call it "Flash"
    Follow the rest of the steps from Step 4 Above.
    SECTION 3
    Going from one carrier locked device to another one like from ATT to TMob - Use the same instructions as in SECTION1 - just download the appropriate firmware.

    FAQ
    Can I get E-Sim with this ?
    Yes, I have updated the instructions in this post.

    If you are doing this to get E-Sim capability that t-mobile just added
    here is a post from someone who converted their phone to T-Mobile version (Old Post can be ignored)


    WARNING - If for some reason you use ODIN to Flash back to Android 10 after being on Android 11, YOU WILL LOSE YOUR DATA
    This is not a guide for Downgrading by whole Android Iteration as in Going from Android X to Android (X-1) or Android (X-2) ____ Versions
    3
    flashed tmob DUH4 yesterday from U1 (DUH3), no issues.. see my post
    Thank you for writing that post, you reminded me that many people are now doing this to get eSIM, when I wrote this post the need was to get OneUI 3 Beta (Android 11). I have updated the first post for eSIM.
    3
    yp, same here. on TMB it has IED greyed out, sim manager missing and cannot connect to mobile data. Have to stop trying now after dozen of flash and wait for new workaround to be discovered.
    Was able convert U1 to TMob version yesterday and activated Tmobile esim with no issues. Firmware used was the one linked in the first post.

    2
    Another reason to switch to U1 firmware is the ability to get access to features that are disabled on carrier versions.
    I went to U1 firmware so I could enable "Call and text on other devices" and get rid off the carrier bloat.
    This is disabled on AT&T and Verizon versions... not sure about T-Mobile/Sprint devices.
    2
    I've been using the u1 version on my u from att after like a month and it's been working great. I also got the april security patch on the 1st so it's definitely being great.