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

Search This thread

warriorvibhu

Inactive Recognized Developer
Aug 28, 2007
1,484
367
Somewhere Amazing
HTC One (m7)
LG V10
I bought mine unlocked U1. Are you using beta? I'm wondering if I will have any difficulty switching back and if I can keep data. I had a lot of difficulty getting the CSC to stick when switching to TMB , I had to do soe roundabout method requiring multiple flashes
Yes I am using beta. Yeah when switching between unlocked and locked variants there will always be risk of data loss.
 

warriorvibhu

Inactive Recognized Developer
Aug 28, 2007
1,484
367
Somewhere Amazing
HTC One (m7)
LG V10
I'm a little nervous to try the flash. I don't want to lose data
Did you try Home_CSC. I never lost data using that. Recently I converted back from U to U1 on Android 12 bootloader 2, all went well.
Does the U1 with no carrier, support esim?
Yes it does, I am using it now.
It was on beta 3, i believe it should on stable.
Yes it is there.

PS - edited to fix typos and grammatical errors. I must have been sleepy when I typed this.
 
Last edited:

PapaDocta

Senior Member
Jun 4, 2004
1,370
150
Thank you warriorvibhu, all went well converting from Verizon U to U1 and all working perfectly except for Google pay... Well at least now I can add many esims as I want unlike Verizon firmware
 
  • Like
Reactions: warriorvibhu

JeffATL

Senior Member
Oct 10, 2009
843
74
Did you try Home_CSC. I never lost data using that. Recently I converted back from U to U1 on Android 12 bootloader 2, all went well.

I updated again today stick with OTA and TMB. Maybe unrelated but one of the issues that broke noticed since A12 update is MMS with Google Messages. I get "message expired or unavailable" error. Thought it was Visible but MMS works in Samsung Messages. In fact if I receive the message while Samsung Messages is default I can switch back to Google and view it fine, but if GM is default get error and switch to SM and msg still unavailable. Tried clearing data but no luck

I thought I was already on EULI from last week but updated OTA again today and still on EULI. Maybe different build number.
 
  • Like
Reactions: warriorvibhu

HoMachine

Member
Dec 31, 2011
13
5
Samsung Galaxy Note 20 Ultra
Sorry iam pretty noob, stupid question, do i need to root my phone first before doing this firmware update?

1 additional question: I'm Andriod 10 right now, do i need to first upgrade to 11 then 12? or I can jump from 10 to 12?
 
Last edited:

Markeee

Senior Member
Sep 29, 2012
1,334
293
South Florida
I just want to flash from U1 to U on a U1 device if I include Home CSC will it resent my phone after reading through this thread I'm still not sure ?
 

warriorvibhu

Inactive Recognized Developer
Aug 28, 2007
1,484
367
Somewhere Amazing
HTC One (m7)
LG V10
I just want to flash from U1 to U on a U1 device if I include Home CSC will it resent my phone after reading through this thread I'm still not sure ?
If bootloader version isn't changing it won't reset. If your going from one bootloader version to another then it will reset.
Similarly of you are going from one android version to another during the conversion it will reset.

It won't reset if
You use Home_CSC and you flash U On U1 or U1 on U but android versions are same and bootloader versions are same.
 

Markeee

Senior Member
Sep 29, 2012
1,334
293
South Florida
If bootloader version isn't changing it won't reset. If your going from one bootloader version to another then it will reset.
Similarly of you are going from one android version to another during the conversion it will reset.

It won't reset if
You use Home_CSC and you flash U On U1 or U1 on U but android versions are same and bootloader versions are same.
Thanks for the reply
I get alot of conflicting replies see what i mean below post ?

 

warriorvibhu

Inactive Recognized Developer
Aug 28, 2007
1,484
367
Somewhere Amazing
HTC One (m7)
LG V10
Thanks for the reply
I get alot of conflicting replies see what i mean below post ?

Well I can't speak for Fold as I don't have one. But my information is accurate for all Note devices starting Note 8 through Note 20 and all Galaxy S Devices from S9 to S21. Those are the ones I have tested / experienced flashing U to U1 or Vice versa.
Happy Flashing and all the best.
 
  • Like
Reactions: Markeee

wesside298

Member
Apr 17, 2021
25
7
las vegas
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
hello bud...??right above you said if your on a locked device download the firmware and..."your own csc"what did you mean by this
 

LucasNTQT

Member
Sep 29, 2020
8
0
Hi @warriorvibhu , i have do the step 5a to get esim but now in stuck in the pattern lock when the phone reset although i have drawn correctly. Can somehow to unlock the screen in this case? Thank you.
 

Dadilov1234

New member
Feb 24, 2022
2
0
Hi guys, i have issue with software updates on my Note 20 Ultra, since i've bought it. It's still on android 10, one iu 2.5 and i have not released any updates yet. My phone model number is SM-N986U, CSC is ATT, baseband version is N986USQU1ATH3. SM-N986U1 model does not have firmware with bootloader 1 (which is mine) for the latest Android 12, only for Android 11 N986U1UEU1DUB5. Would you help me, please? Witch firmware should i download and install?
 

Top Liked Posts

  • There are no posts matching your filters.
  • 7
    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.