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[Guide] - Odin Upgrading / 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
7
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
7
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
65
9
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?
 
Last edited:

dadmi

Senior Member
Sep 15, 2012
65
9
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.
 

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  • 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.

    1
    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.
  • 3
    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
    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.
    PART 1

    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.
    For changing Carrier locked device to Unlocked Firmware (N986U to N986U1) Download the firmware for U1 from OTA Thread or by using Frija

    If you are Flashing One UI 3 Stable download the appropriate firmware. There are many resources for that, 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)
    5. Do the same for CSC (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.
    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

    PART 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.

    FAQ
    Can I get E-Sim with this ?
    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.


    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
    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.
    1
    I have been trying to odin my att note 20 ultra to the t-mobile firmware, so far I've only been able to get it to boot like it is the unlocked version, and can't find the reason
    I dont know anyone who has done such a thing but i guess there is a use case for everything. Have you tried flashing unlocked Variant first and then Odin to T-Mobile.