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

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warriorvibhu

Inactive Recognized Developer
Aug 28, 2007
1,419
327
Somewhere Amazing
HTC One (m7)
LG V10
I have a T-mobile N986U , I was flash to unlocked(U1) for UI3 beta and keep OTA update, now when I use Odin to flash back to T-mobile (U) it success and reboot automatic but it reboot 2 to 3 time then my phone boot to recovery mode but only had 3 option reboot, factory reset and recovery log. Phone work when I flash back U1 without data lost.

N986U1UES2DUC8 > Good
N986U1UES2DUD5 > Good
N986USQU2DUC8 > Can't boot

Anyone can help how to flash back to t-mobile with e-sim support?
It seems due to bootloader upgrade to bootloader 2, when it comes to flashing U1 to U or U to U1 there is a problem with booting devices. 2DUD5 and 2DUC8 means you are on bootloader 2. So when you were on Bootloader 1 after that whatever you flashed U or U1 that was bootloader version 2, your device got locked to that. It seems you flashed U1 ROM with Bootloader 2. You will have to be on U1 until a solution is found.
Others feel free to correct me or update my info.
 

rjohnstone

Senior Member
I have a T-mobile N986U , I was flash to unlocked(U1) for UI3 beta and keep OTA update, now when I use Odin to flash back to T-mobile (U) it success and reboot automatic but it reboot 2 to 3 time then my phone boot to recovery mode but only had 3 option reboot, factory reset and recovery log. Phone work when I flash back U1 without data lost.

N986U1UES2DUC8 > Good
N986U1UES2DUD5 > Good
N986USQU2DUC8 > Can't boot

Anyone can help how to flash back to t-mobile with e-sim support?
You have to factory reset when you switch from a U image to U1 and same when going from U1 to U.
Once you reset your phone, it will boot normally.
You'll lose all your data and settings. No way to avoid that.
 

3GJockey

Member
Dec 30, 2007
42
7
Great guide to people like me that are thinking about dipping their toes in for the first time when it comes to flashing. I do have a question or two though:

What are the advantages of flashing from a U device to the unlocked U1 version? For instance I have the T-mobile U version and I have for the most part uninstalled all the carrier bloatware that came with it and put the ones that I couldn't into deep sleep so my battery life for the most part is unaffected. I also got it unlocked when I first got it since I paid outright for it. I notice most people also like getting updates faster and flashing enables them to do so but I honestly don't mind waiting for the slower OTA ones.

I guess I'm looking for a reason to do this (bored too) and use it as a learning process as well to gain the experience since I've never flashed before. Are there any settings or features in the U1 devices that I can't get from the play store that I can get by flashing? The only feature I truly miss is call recording but I don't think anyone has been able to figure that out yet..
Well, as a guy with a SM-986U1, I can tell you that you'll LOSE eSIM / dual SIM functionality.
That's the reason I bought this phone (Amazon) instead of the S21. I read that it was eSIM enabled on T-Mo. But not mine.
 

3GJockey

Member
Dec 30, 2007
42
7
And that's what I explained to you. You have to flash u1 and how to do it is on the OP(Opening Post). Just read carefully and read the other threads linked there too.
The confusion here is, i think, because Shaun is not aware that he's using imprecise language. I sympathize, since I barely (or don't) know what I'm talking about here.

Shaun has SIM unlocked his U phone from Tmo, but has not flashed to an "unlocked" U1 firmware.

Rskyline thought Shaun meant he had already flashed U1 firmware. So there's confusion around the term "unlocked".

Now, for my opinion: Shaun, I have a U1 USA firmware phone I bought "unlocked" from Amazon. It's also SIM unlocked, but running a T-Mobile SIM card. And I STILL have the Tmo logo at login, because I'm running a Tmo "Service Provider Software Version" i.e. TMB/TMB/XAA. This package was installed after I inserted the SIM card the 1st time.

While I don't understand why you'd care about a logo that pops up for a second once a week or so, that's your choice. I'd bet there are hacks to remove that, but this thread is about flashing different firmware, and so your question is probably not relevant here.

Good luck.
 

3GJockey

Member
Dec 30, 2007
42
7
I just tried flashing TMB U firmware on U1 for eSim.
I used HOME_CSC from TMB firmware to not lose the data, flashed successfully, but failed to boot.
So, I flashed U1 firmware again with HOME_CSC from XAA, I was able to boot again then.
Edit: Just realized that it now says TMB/TMB/XAA on software info after reflashing U1 firmware. :\
Just FYI, I bought mine unlocked U1 from Amazon, have not successfully flashed it at all, AND it has the TMB/TMB/XAA. I accepted software from Tmo from a prompt when I put the SIM card in the 1st time. But I like most of the Tmo "bloat".

So the TMB/XAA you're seeing on your phone was probably there before all your flashing.
 

dj24

Senior Member
Jun 23, 2018
183
52
Samsung Galaxy Note 20 Ultra
Well, as a guy with a SM-986U1, I can tell you that you'll LOSE eSIM / dual SIM functionality.
That's the reason I bought this phone (Amazon) instead of the S21. I read that it was eSIM enabled on T-Mo. But not mine.
You're right. Flashing back to UI is not an option for me anymore since I'm now utilizing the dual sim feature in a different country. What's really surprising is how slow t-mobile has become since the sprint merger in pushing out updates. They've literally fallen asleep and we're still stuck on the March 1 Security update. I'm giving them the benefit of the doubt for now since they did activate the dual sim feature for us last time around and am hoping for more goodies like dual recording feature for the next one. Hopefully it'll be sometime in 2021 :)
 
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Limeybastard

Senior Member
Oct 3, 2013
6,966
1,277
Florida unfortunately.
The confusion here is, i think, because Shaun is not aware that he's using imprecise language. I sympathize, since I barely (or don't) know what I'm talking about here.

Shaun has SIM unlocked his U phone from Tmo, but has not flashed to an "unlocked" U1 firmware.

Rskyline thought Shaun meant he had already flashed U1 firmware. So there's confusion around the term "unlocked".

Now, for my opinion: Shaun, I have a U1 USA firmware phone I bought "unlocked" from Amazon. It's also SIM unlocked, but running a T-Mobile SIM card. And I STILL have the Tmo logo at login, because I'm running a Tmo "Service Provider Software Version" i.e. TMB/TMB/XAA. This package was installed after I inserted the SIM card the 1st time.

While I don't understand why you'd care about a logo that pops up for a second once a week or so, that's your choice. I'd bet there are hacks to remove that, but this thread is about flashing different firmware, and so your question is probably not relevant here.

Good luck.
That's interesting Shaun, if memory serves me correctly back in the days the sim unlocked Samsung devices would brand switch only when changing SIM cards. The unlocked by Samsung U1 ones didn't.

Edit. Memory obviously doesn't serve me correctly. 🤣
 
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3GJockey

Member
Dec 30, 2007
42
7
That's interesting Shaun, if memory serves me correctly back in the days the sim unlocked Samsung devices would brand switch only when changing SIM cards. The unlocked by Samsung U1 ones didn't.

Edit. Memory obviously doesn't serve me correctly. 🤣
Well, I also have memory lapses, and it's been a couple of months, but I think in this case I was ASKED if I wanted some T-mo bloat, and I chose yes because I like a few of their features (and mistakenly thought it would give me eSIM.)
 
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thegreatway

New member
Mar 12, 2019
2
1
Hi I have a note 20 Ultra from Xfinity. I paid it off, and got it unlocked. I would like to get rid of the bloatware also change apn settings. I have the N986USQSDUE2 and the latest july patch update from samsung. Can I switch to U1 factory unlocked? since it looks like booatloader 2? what version of U1 do i need?
 

Limeybastard

Senior Member
Oct 3, 2013
6,966
1,277
Florida unfortunately.
Hi I have a note 20 Ultra from Xfinity. I paid it off, and got it unlocked. I would like to get rid of the bloatware also change apn settings. I have the N986USQSDUE2 and the latest july patch update from samsung. Can I switch to U1 factory unlocked? since it looks like booatloader 2? what version of U1 do i need?
If you're on bootloader 2 then you'll need bootloader 2 U1.
 
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dawinner

Senior Member
Jul 26, 2011
86
2
Hey Everyone,

I have Unlocked Note 20 Ultra 5G (SM-986U1). I want to flash T-Mobile CSC to enable ESim. Is that possible? Can I just flash CSC and get Esim or do I need to flash the complete T-Mobile ROM?

Also, for ESim, do I need to flash the locked version or unlocked version of TMB will work? (I mean is it mandatory to flash U version to enable Esim or can I just flash U1 version of TMB?)

I used FRIJA to download the firmware version: G986U1UES2DUE2/G986U1OYZ2DUE2/G986U1UES2DUE2
(I typed TMB in the CSC section of frija)

Can someone guide me?

Thanks.
 
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bigTINY779

Senior Member
Hey Everyone,

I have Unlocked Note 20 Ultra 5G (SM-986U1). I want to flash T-Mobile CSC to enable ESim. Is that possible? Can I just flash CSC and get Esim or do I need to flash the complete T-Mobile ROM?

Also, for ESim, do I need to flash the locked version or unlocked version of TMB will work? (I mean is it mandatory to flash U version to enable Esim or can I just flash U1 version of TMB?)

I used FRIJA to download the firmware version: G986U1UES2DUE2/G986U1OYZ2DUE2/G986U1UES2DUE2
(I typed TMB in the CSC section of frija)

Can someone guide me?

Thanks.
gotta be full U version bud. and gotta be a clean wipe install. been rockin the esim in my U1 on Mint Mobile for about 3 days now. works great
 

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dawinner

Senior Member
Jul 26, 2011
86
2
gotta be full U version bud. and gotta be a clean wipe install. been rockin the esim in my U1 on Mint Mobile for about 3 days now. works great
Thanks Bud. I did a complete wipe and installed U version of TMB. My About phone shows the ESim IMEI (It is greyed out). But there is no SIM card manager

I have no Idea what to do next. Also, I didnt write the User Data file. Should I have done that?

Also, I aint entering T-Mobile Sim. Is that something whats causing this.

Any idea what can I do to get the SIM Card manager menu?
 
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bigTINY779

Senior Member
Thanks Bud. I did a complete wipe and installed U version of TMB. My About phone shows the ESim IMEI (It is greyed out). But there is no SIM card manager

I have no Idea what to do next. Also, I didnt write the User Data file. Should I have done that?

Also, I aint entering T-Mobile Sim. Is that something whats causing this.

Any idea what can I do to get the SIM Card manager menu?
yes FULL firmware... including userdata
 

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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.