Database Info

[Tmk] csc not included in 955u multi-csc list on T-Mobile or xfinity firmwares...?

How do I incorporate [tmk ] csc from a 955u1 firmware multi-csc into my 955u T-Mobile firmware? Can I just flash the csc_home in odin from the 955u1? On first boot with the sim card inserted it cannot find necessary Files to load features.
Sent from my BTV-W09 using Tapatalk

tdamocles said:
How do I incorporate [tmk ] csc from a 955u1 firmware multi-csc into my 955u T-Mobile firmware? Can I just flash the csc_home in odin from the 955u1? On first boot with the sim card inserted it cannot find necessary Files to load features.
Sent from my BTV-W09 using Tapatalk
Click to expand...
Click to collapse
Flashing Home will leave your CSC at what ever it was before the flash, I believe. It's meant, near as I understand, to leave your 'home' settings alone.
Find a CSC that matches you ROM, 'U' as you've indicated, that has XAA CSC within it, and has the Aroma installer built into the CSC package..
Once you start the install, select XAA at the first opportunity, then on the next 'page' you will have choices for ATT, T-Mobile, etc. You should also see another 'XAA' option to select, which is a 'generic' selection. I use that. I believe the generic selection works for all US GSM phones, without bloat. Make sure your SIM card is in the phone when booting into System.
You may have to input the T-Mobile APN if the phone does not find the carrier, so if the system does not pick up your T-Mobile network right away. If not try a network search. If that fails, reset the network, reboot and see if T-Mobile is grabbed. If not, input a new, correct T-Mobile APN, and reboot.
Should work as long as all other things are OK.

JeffDC said:
Flashing Home will leave your CSC at what ever it was before the flash, I believe. It's meant, near as I understand, to leave your 'home' settings alone.
Find a CSC that matches you ROM, 'U' as you've indicated, that has XAA CSC within it, and has the Aroma installer built into the CSC package..
Once you start the install, select XAA at the first opportunity, then on the next 'page' you will have choices for ATT, T-Mobile, etc. You should also see another 'XAA' option to select, which is a 'generic' selection. I use that. I believe the generic selection works for all US GSM phones, without bloat. Make sure your SIM card is in the phone when booting into System.
You may have to input the T-Mobile APN if the phone does not find the carrier, so if the system does not pick up your T-Mobile network right away. If not try a network search. If that fails, reset the network, reboot and see if T-Mobile is grabbed. If not, input a new, correct T-Mobile APN, and reboot.
Should work as long as all other things are OK.
Click to expand...
Click to collapse
I am not rooted and was refering to flashing in Odin. By what means do you achieve your method, I'm truly misinterpreting what you are trying to tell me. I can get features like volte and WiFi calling to work in the unlocked u1 tmk firmware but with the new information out about bl3 I switched to carrier "u" firmware(tmb) because I have an original Xfinity "u" phone but carrier "u" firmware isn't loading necessary stuff.
Trying to acheive this for MetroPCS.
Sent from my SM-G955U using Tapatalk

I flashed the T-Mobile firmware bql1 but it ended up not giving me any bloatware except Facebook and no T-Mobile boot screen and xaa/xaa/cct in about phone. Can not get MetroPCS volte and WiFi calling working on the 955 "u" firmware. Any guidance would be much appreciated.
Sent from my SM-G955U using Tapatalk

network locked s10 5G

purchasing a korean phone (in my case s10 5G U+) sim unlocked, the sim card was working good, after updating to the latest march update the sim worked for about one hour then a crossed circle appeared on the top. and no sim card can be read.
what does it mean ? what should I do ?
is it locked or a software issue ?

STALKER18 said:
purchasing a korean phone (in my case s10 5G U+) sim unlocked, the sim card was working good, after updating to the latest march update the sim worked for about one hour then a crossed circle appeared on the top. and no sim card can be read.
what does it mean ? what should I do ?
is it locked or a software issue ?
Click to expand...
Click to collapse
I suggest adding the device model to the thread title.

STALKER18 said:
purchasing a korean phone (in my case s10 5G U+) sim unlocked, the sim card was working good, after updating to the latest march update the sim worked for about one hour then a crossed circle appeared on the top. and no sim card can be read.
what does it mean ? what should I do ?
is it locked or a software?
Click to expand...
Click to collapse
I don't know if you've already tried this but, try backing up the data that you want to save from your device, then boot into to recovery and choose factory reset, when the factory reset finishes, wipe the cache partition while in recovery then reboot the device.
Contact customer support for your mobile carrier and tell them that you lost service after the update was applied, then see if there is anything they can do from within their system to restore your cellular/network connection. If they mention sending you a new SIM, tell them no and that you will try to fix it first and then if it doesn't work you will accept a new SIM from them. Try finding a different solution before you resort to getting a new SIM because the issue might not even be the SIM but it's worth trying to see if they can do anything before you start trying to find software/flashing solutions that you can do yourself.
If you flashed the update yourself, you might have used an update for a different region. If this is what you did, you need to find the update for your model number and for your specific region, country or carrier. Or you can flash just the modem img or bin file that has been extracted from a firmware update that is for your region, country or carrier.
If that doesn't work. Try flashing the firmware version that you had before the update was applied.

Droidriven said:
I don't know if you've already tried this but, try backing up the data that you want to save from your device, then boot into to recovery and choose factory reset, when the factory reset finishes, wipe the cache partition while in recovery then reboot the device.
Contact customer support for your mobile carrier and tell them that you lost service after the update was applied, then see if there is anything they can do from within their system to restore your cellular/network connection. If they mention sending you a new SIM, tell them no and that you will try to fix it first and then if it doesn't work you will accept a new SIM from them. Try finding a different solution before you resort to getting a new SIM because the issue might not even be the SIM but it's worth trying to see if they can do anything before you start trying to find software/flashing solutions that you can do yourself.
If you flashed the update yourself, you might have used an update for a different region. If this is what you did, you need to find the update for your model number and for your specific region, country or carrier. Or you can flash just the modem img or bin file that has been extracted from a firmware update that is for your region, country or carrier.
If that doesn't work. Try flashing the firmware version that you had before the update was applied.
Click to expand...
Click to collapse
thank you for your time and you helping.
I actually tried to factory reset but the device cant let you enter the recovery.
eventually i replades the device. it was some sort of update issue with this specific device.

Convert N20 Ultra from VZW to T-MO

Hello, I have an unlocked Galaxy Note 20 Ultra from Verizon. I am wondering if it is possible to fully convert this device to work fully with TMobile I was specifically wondering if it's possible to use TMobiles 5G Network on this device. I have flashed the U1 Firmware to the device but it never showed me an Option to choose my carrier or anything like that, and even though the Signal shows 5G whenever I turn a speed test or view the cell info it pops up as LTE

You need to change your device CSC to TMB and flash TMB U firmware, not U1.
You device currently shows VZW/VZW/VZW in your screenshot.
It should read TMB/TMB/TMB, or at least VZW/VZW/TMB.
The SIM card itself will determine what network you have access to.
Be careful though as you have now flashed newer firmware with the new version 2 bootloader.
So you can only use firmware with that bootloader version. No going back.

rjohnstone said:
You need to change your device CSC to TMB and flash TMB U firmware, not U1.
You device currently shows VZW/VZW/VZW in your screenshot.
It should read TMB/TMB/TMB, or at least VZW/VZW/TMB.
The SIM card itself will determine what network you have access to.
Be careful though as you have now flashed newer firmware with the new version 2 bootloader.
So you can only use firmware with that bootloader version. No going back.
Click to expand...
Click to collapse
If you change ur CSC from VZW to TMB, then it will read TMB/TMB/VZW in your screenshot.
You can only change to TMB/TMB/TMB if you root your phone .
For more details, visit https://forum.xda-developers.com/t/...bands-and-services-5g-low-band-on-u1.4182293/
Please note, some codes in original post don't work for some, with latest 10.1 Update.

Using Sammobile, I've seen U1 firmware with a T-Mobile CSC. That way you won't have all the T-Mobile apps or boot screen.

Since CSC change is not possible with latest UI 3.1 update what are options to change CSC

HI all,
With CSC change not possible using codes with latest UI 3.1 update what are options to change CSC?
For ex. I have SM-N986U unlocked Tmobile device but i changed CSC to ATT as im currently using ATT Prepaid and I'm on latest Apr update for ATT
How can i revert back to Tmobile CSC?
Do i need to flash Tmobile firmware using ODIN by first flashing to U1 firmware then Tmobile firmware or can i directly flash Tmobile latest firmware with Apr update using ODIN?
Will i be able to retain my app and data if I flash Tmobile firmware?
Any help will be appreciated.
Thanks

So you state csc change not possible then ask how to change it? lol.. and if it were as easy to just flash firmware in odin tgen that wouldve been the way to do it to begin with I would think lol

Update:
I was able to change CSC(ATT/ATT/TMB) to TMB/TMB/TMB but it was long and winded way. Just flashing firmware was not enough , need Tmobile sim to install carrier service and change CSC.
I followed the steps below:-
1) Did backup of my device using Smart Switch and removed my ATT sim.
2) Flashed latest T-Mobile firmware( N986USQU2DUC8 ) using instructions from post - https://forum.xda-developers.com/t/ota-and-non-ota-firmware-for-n986u-and-n986u1.4143833/ . Also, downloaded the ODIN (patched version) and T-Mobile firmware from links in the post. Flashed HOME_CSC too.
3) After rebooting phone with new firmware , the boot up screen was still ATT and CSC was still ATT/ATT/TMB.
4)Shut down phone and inserted Tmobile SIM i had lying around.
5) On reboot, i was asked to install Tmobile carrier services and on restart , Tmobile logo came on boot up with CSC changed to TMB/TMB/TMB.
6) Now, i have esim enabled and SIM manager showing up too.

mindseye0803 said:
Update:
I was able to change CSC(ATT/ATT/TMB) to TMB/TMB/TMB but it was long and winded way. Just flashing firmware was not enough , need Tmobile sim to install carrier service and change CSC.
I followed the steps below:-
1) Did backup of my device using Smart Switch and removed my ATT sim.
2) Flashed latest T-Mobile firmware( N986USQU2DUC8 ) using instructions from post - https://forum.xda-developers.com/t/ota-and-non-ota-firmware-for-n986u-and-n986u1.4143833/ . Also, downloaded the ODIN (patched version) and T-Mobile firmware from links in the post. Flashed HOME_CSC too.
3) After rebooting phone with new firmware , the boot up screen was still ATT and CSC was still ATT/ATT/TMB.
4)Shut down phone and inserted Tmobile SIM i had lying around.
5) On reboot, i was asked to install Tmobile carrier services and on restart , Tmobile logo came on boot up with CSC changed to TMB/TMB/TMB.
6) Now, i have esim enabled and SIM manager showing up too.
Click to expand...
Click to collapse
thats the normal process.. that firmware is same for each carrier.. firmware is multi csc which changes based on sim inserted.. shouldnt have to go through all of that really.. i think most ppl who have issues are trying to change csc without a active sim card or on carrier locked devices etc.
glad u figured it out tho!

elliwigy said:
thats the normal process.. that firmware is same for each carrier.. firmware is multi csc which changes based on sim inserted.. shouldnt have to go through all of that really.. i think most ppl who have issues are trying to change csc without a active sim card or on carrier locked devices etc.
glad u figured it out tho!
Click to expand...
Click to collapse
Well, the confusion for most ppl who are new to Samsung and CSC, like me , is that we could change CSC with code earlier and now cannot. Didn't have these issues with pixel and iPhone.

mindseye0803 said:
Well, the confusion for most ppl who are new to Samsung and CSC, like me , is that we could change CSC with code earlier and now cannot. Didn't have these issues with pixel and iPhone.
Click to expand...
Click to collapse
pixel and iphone dont have multi csc like samsung does.. just curious, when were u able to change csc with code earlier if ur new to samsung? lol

elliwigy said:
pixel and iphone dont have multi csc like samsung does.. just curious, when were u able to change csc with code earlier if ur new to samsung? lol
Click to expand...
Click to collapse
Yes, I was able to change CSC to ATT from TMobile, enable all LTE/5G bands before One UI update.Not, sure what u find so funny .
Yes, I'm aware that there is no CSC concept in pixel or iPhone or any other other manufacturer that I'm aware nor they are crippled in terms of hardware capability from carrier software like Samsung. LTE/5G bands not being enabled , esim not being enabled etc.

mindseye0803 said:
Yes, I was able to change CSC to ATT from TMobile, enable all LTE/5G bands before One UI update.Not, sure what u find so funny .
Yes, I'm aware that there is no CSC concept in pixel or iPhone or any other other manufacturer that I'm aware nor they are crippled in terms of hardware capability from carrier software like Samsung. LTE/5G bands not being enabled , esim not being enabled etc.
Click to expand...
Click to collapse
actually other devices are crippled in some cased disabled entirely.. for example u cant get a tmb oneplus 9 pro 5g and use it on verizon to get 5g bcuz vzw 5g bands are disabled in tmb variant..
its really the carriers to be honest..
and I say LOL all the time even in normal convo so not actually laughing sometimes, just say it out of habit

elliwigy said:
actually other devices are crippled in some cased disabled entirely.. for example u cant get a tmb oneplus 9 pro 5g and use it on verizon to get 5g bcuz vzw 5g bands are disabled in tmb variant..
its really the carriers to be honest..
and I say LOL all the time even in normal convo so not actually laughing sometimes, just say it out of habit
Click to expand...
Click to collapse
I have phones such as Z Flip3 5G and other models that do not change CSC like older models when following the flash procedure starting with U1, but the phones never prompt a restart. I have noticed it seems to be with TMB or VZW units. Any suggestion on how to actually get the CSC to change properly or is this something they are doing with new phones to avoid being able to use them fully on other carriers?

yygemmi770 said:
I have phones such as Z Flip3 5G and other models that do not change CSC like older models when following the flash procedure starting with U1, but the phones never prompt a restart. I have noticed it seems to be with TMB or VZW units. Any suggestion on how to actually get the CSC to change properly or is this something they are doing with new phones to avoid being able to use them fully on other carriers?
Click to expand...
Click to collapse
SamKey.org
Go to the page, download theirs Samkey app, buy few credits on Ebay and you can change the CSC as you wish in a minute, the phone will reboot without loosing your data, it's the easiest way as far as I know

Hi, I have yhe following issue and I need your thoughts please.
I have a Telus plan, canadian with US roaming option.
I am traveling in US alot. I have a Note 20 Ultra U1 from Samsung USA. When in US I can only register on Tmobile and I can get 5G icon too. Won't let me on ATT or Verizon.
With same sim card in Note20 Ultra "W" variant, canadian one, it wil register on all 3 major networks in US. No issues with the sim, I guess.
Also in Canada won't get 5G ever.
My provider said nothing to do with them, Samsung told me the same.
I reseted all network setings my APN is ok. VOLTE on. Only getting acces to Tmobile.
Any ideea how I can fix this ? Is it related to CSC ? Mine is XAA.

mindseye0803 said:
Update:
I was able to change CSC(ATT/ATT/TMB) to TMB/TMB/TMB but it was long and winded way. Just flashing firmware was not enough , need Tmobile sim to install carrier service and change CSC.
I followed the steps below:-
1) Did backup of my device using Smart Switch and removed my ATT sim.
2) Flashed latest T-Mobile firmware( N986USQU2DUC8 ) using instructions from post - https://forum.xda-developers.com/t/ota-and-non-ota-firmware-for-n986u-and-n986u1.4143833/ . Also, downloaded the ODIN (patched version) and T-Mobile firmware from links in the post. Flashed HOME_CSC too.
3) After rebooting phone with new firmware , the boot up screen was still ATT and CSC was still ATT/ATT/TMB.
4)Shut down phone and inserted Tmobile SIM i had lying around.
5) On reboot, i was asked to install Tmobile carrier services and on restart , Tmobile logo came on boot up with CSC changed to TMB/TMB/TMB.
6) Now, i have esim enabled and SIM manager showing up too.
Click to expand...
Click to collapse
So I have a Verizon phone and I switched to t-mobile. If I use this method to switch my csc would that lock my phone or would it stay unlocked?

Stevieboy02008 said:
So I have a Verizon phone and I switched to t-mobile. If I use this method to switch my csc would that lock my phone or would it stay unlocked?
Click to expand...
Click to collapse
Unlocked. Phone once unlocked will not lock to any carrier.

dadmi said:
Unlocked. Phone once unlocked will not lock to any carrier.
Click to expand...
Click to collapse
Thank you

(HELP)SM-N986U1 change CSC to TMB - Enable ESIm

Hey Everyone,
I have unlocked SM-N986U1 with the latest update installed (Updated with latest June update). I wanted to change my CSC to TMB (T-Mobile) so as to enable ESeim support. I tried using Samkey, wasted 1 credit too. It said CSC updated but nothing happened, my carrier still shows XAA.
Can anyone please guide me on how can I change CSC to TMB?
Thanks.

dawinner said:
Hey Everyone,
I have unlocked SM-N986U1 with the latest update installed (Updated with latest June update). I wanted to change my CSC to TMB (T-Mobile) so as to enable ESeim support. I tried using Samkey, wasted 1 credit too. It said CSC updated but nothing happened, my carrier still shows XAA.
Can anyone please guide me on how can I change CSC to TMB?
Thanks.
Click to expand...
Click to collapse
These links'could help. I think you have to flash the TMB Rom which enables and support the eSim on the phone. It would help to have a Tmobile Sim around during this process but I have heard others say it is not needed.
Note 20 Ultra eSIM update is here!! (T-mobile USA)
Guys, FINALLY!!! Woohoo! We have eSIM support on Note 20 Ultra US Snapdragon version for T-mobile. There is an OTA you can download and then convert your physical SIM to eSIM :)
forum.xda-developers.com
[Guide] - eSim Firmware Flash/ Odin Upgrade/ Flashing and N986U to N986U1 & Vice Versa
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...
forum.xda-developers.com

Mbetu said:
These links'could help. I think you have to flash the TMB Rom which enables and support the eSim on the phone. It would help to have a Tmobile Sim around during this process but I have heard others say it is not needed.
Note 20 Ultra eSIM update is here!! (T-mobile USA)
Guys, FINALLY!!! Woohoo! We have eSIM support on Note 20 Ultra US Snapdragon version for T-mobile. There is an OTA you can download and then convert your physical SIM to eSIM :)
forum.xda-developers.com
[Guide] - eSim Firmware Flash/ Odin Upgrade/ Flashing and N986U to N986U1 & Vice Versa
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...
forum.xda-developers.com
Click to expand...
Click to collapse
Thanks for the link to guide. I was going through it and there is a warning on the top saying if you have Bootloader 2 you won't be able to flash U firmware on U1. I believe as I have all the latest updates I wont be be able to flash it.
Thanks for your help.

dawinner said:
Thanks for the link to guide. I was going through it and there is a warning on the top saying if you have Bootloader 2 you won't be able to flash U firmware on U1. I believe as I have all the latest updates I wont be be able to flash it.
Thanks for your help.
Click to expand...
Click to collapse
Yes you can. My device is from Xfinity and I have done the switch to any Carrier I choose on bootloader 2. U1 to U and back is doable. The key is to use the modified Odin as specified in the guide.
"
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

Mbetu said:
Yes you can. My device is from Xfinity and I have done the switch to any Carrier I choose on bootloader 2. U1 to U and back is doable. The key is to use the modified Odin as specified in the guide.
"
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
Click to expand...
Click to collapse
Thanks for the steps. Couple of Quick Questions:
1) I used frija to download the firmware (I typed CSC: TMB in frija, as its the first time I am using it, is it the right way)
2) I also checked the version in frija with the CSC: XAA, the version is same. How can I make sure that I have downloaded the correct TMB firmware.
Thanks.

dawinner said:
Thanks for the steps. Couple of Quick Questions:
1) I used frija to download the firmware (I typed CSC: TMB in frija, as its the first time I am using it, is it the right way)
2) I also checked the version in frija with the CSC: XAA, the version is same. How can I make sure that I have downloaded the correct TMB firmware.
Thanks.
Click to expand...
Click to collapse
You might want to extract the files and check for differences. The Frija tool has been kind of good to me.

Mbetu said:
You might want to extract the files and check for differences. The Frija tool has been kind of good to me.
Click to expand...
Click to collapse
Thanks for all the help, one last question, and I dont know if you will know about this:
To enable ESIM (Only T-Mobile version has E-SIM), do I need to flash U version of T-Mobile of U1 version of T-Mobile will also provide me with the same ESIM functionality?

dawinner said:
Thanks for all the help, one last question, and I dont know if you will know about this:
To enable ESIM (Only T-Mobile version has E-SIM), do I need to flash U version of T-Mobile of U1 version of T-Mobile will also provide me with the same ESIM functionality?
Click to expand...
Click to collapse
I think I flashed the U version of Tmobile but it does not hurt to try both. This is what my device info says after converting my Xfiniti to Tmobile

Mbetu said:
I think I flashed the U version of Tmobile but it does not hurt to try both. This is what my device info says after converting my Xfiniti to Tmobile
Click to expand...
Click to collapse
Thanks!!!!

Mbetu said:
I think I flashed the U version of Tmobile but it does not hurt to try both. This is what my device info says after converting my Xfiniti to Tmobile
Click to expand...
Click to collapse
I flashed the complete U firmware except the USER DATA file. But my Service Provider Software version is still stuck at XAA, its not changing to TMB. Though the phone model has changed to what you have in your screenshot.
Any idea what to do?

dawinner said:
I flashed the complete U firmware except the USER DATA file. But my Service Provider Software version is still stuck at XAA, its not changing to TMB. Though the phone model has changed to what you have in your screenshot.
Any idea what to do?
Click to expand...
Click to collapse
So the Model is 986U/DS ? And is eSim enabled ?. That is the state you would want to be in. I understand the last XXX in the service provider software can't be changed. Mine didn't change and stayed CCT which is for xfinity but the as you can see, I have TMB/TMB, TMB/CCT. Esim is enabled and my Mint mobile (Tmobile) number is on it and I have a foreign physical Sim which is roaming on AT&T on the physical slot.
You might be close.

Mbetu said:
So the Model is 986U/DS ? And is eSim enabled ?. That is the state you would want to be in. I understand the last XXX in the service provider software can't be changed. Mine didn't change and stayed CCT which is for xfinity but the as you can see, I have TMB/TMB, TMB/CCT. Esim is enabled and my Mint mobile (Tmobile) number is on it and I have a foreign physical Sim which is roaming on AT&T on the physical slot.
You might be close.
Click to expand...
Click to collapse
Also picked this nugget up from another thread
"You have to flash full tmb firmware. Not xaa tmb but 986u tmb firmware. The esim is in the user data section you'll flash"
Others have suggested you have to do a factory reset or flash the actual CSC file not the Home CSC which means you will loose DATA. I was doing this on a phone I had not setup yet so didn't mind loosing DATA. I am also assuming you have a TMB sim card in the phone because I understand that is needed so the phone can connect to Tmobile and download the carrier data files that actually changes the CSC after a clean flash.
These are just some of the things I picked up from here when doing my conversion.

Mbetu said:
Also picked this nugget up from another thread
"You have to flash full tmb firmware. Not xaa tmb but 986u tmb firmware. The esim is in the user data section you'll flash"
Others have suggested you have to do a factory reset or flash the actual CSC file not the Home CSC which means you will loose DATA. I was doing this on a phone I had not setup yet so didn't mind loosing DATA. I am also assuming you have a TMB sim card in the phone because I understand that is needed so the phone can connect to Tmobile and download the carrier data files that actually changes the CSC after a clean flash.
These are just some of the things I picked up from here when doing my conversion.
Click to expand...
Click to collapse
Yup I used the TMB version only. The model Number changed to 986U/DS. In About phone, it shows me the IMEI of the Esim, but its greyed out.
The only thing I dont have is the T-Mobile Sim. I think thats whats causing the issue. I will arrange a t-Mobile sim and try it tomorrow.
Thanks for all the help.

Mbetu said:
Also picked this nugget up from another thread
"You have to flash full tmb firmware. Not xaa tmb but 986u tmb firmware. The esim is in the user data section you'll flash"
Others have suggested you have to do a factory reset or flash the actual CSC file not the Home CSC which means you will loose DATA. I was doing this on a phone I had not setup yet so didn't mind loosing DATA. I am also assuming you have a TMB sim card in the phone because I understand that is needed so the phone can connect to Tmobile and download the carrier data files that actually changes the CSC after a clean flash.
These are just some of the things I picked up from here when doing my conversion.
Click to expand...
Click to collapse
QQ: Does it has to be a T-Mobile Sim? or Mint mobile or anyother T-Mobile based MVNO should work?

dawinner said:
QQ: Does it has to be a T-Mobile Sim? or Mint mobile or anyother T-Mobile based MVNO should work?
Click to expand...
Click to collapse
Has to be a Tmobile Sim. I tried a Mint Sim it didn't work. If you are seeing the esim but greyed out, then you are close. Restart with a Tmobile Sim and you might be in business

Mbetu said:
Has to be a Tmobile Sim. I tried a Mint Sim it didn't work. If you are seeing the esim but greyed out, then you are close. Restart with a Tmobile Sim and you might be in business
Click to expand...
Click to collapse
Thanks that helps. I just have to figure a way to get a tmobile sim. I dont have it. Lol. Will try again once I get my hands on a Tmobile sim.
Thanks for the help.

dawinner said:
Thanks that helps. I just have to figure a way to get a tmobile sim. I dont have it. Lol. Will try again once I get my hands on a Tmobile sim.
Thanks for the help.
Click to expand...
Click to collapse
Anytime. FYI, dois not have to be an active TMB sim. Used ones are on ebay for about 2 bucks.

Mbetu said:
Anytime. FYI, dois not have to be an active TMB sim. Used ones are on ebay for about 2 bucks.
Click to expand...
Click to collapse
Thanks. Let me try those.

Since the OP looks like problem solved, and not wanting to waste new thread, i have similar issues, can you help?
I have an S10e I recently broke (amazon renewed w/U1 FW), so I got another S10e from amazon, renewed which appears to also be U1 FW.
Except the latest, the replacement phone, the one I have now, NOONE can hear me, like all the time!!!!!!! Dead spots everywhere! Its so annoying. Its like i have a bad Mic? Or something...
This didn't happen with my identical phone, the one I had prior to this one, using identical sim.
I'm on Mint mobile, which is a TMO MVNO and currently have XAA/XAG FW running on the new S10e, the new one w/bad Mic or FW problem
It appears I am on U1 Unlocked USA firmware on latest phone ( i may have flashed FW Odin when I got this new one-to be safe- i forgot)
ALSO: BOTH renewed S10e's I've Purchased from Amazon, when lookup the IMEI, it shows as the AT&T Model. Which i understand the U/U1 FW can be swapped, BUT, both phones were advertised as U1 Models for the Hardware, so they sold me U models but they flashed with U1 FW probably to make more money. (this may seem trivial, but Samsung specifically has stated TWICE, that I couldn't Beta Test their last to major android FW's, because my phone shows as At&t on their end, and not the truly unlocked U1 model, for which the beta tests were for. And i was told when i purchased it was fully unlocked U1 ver. The phone itself even says its 970u1 in settings etc.)
Are there ANY hardware (including frequency bands) differences between U and U1 Models???
Is it somehow possible that my CSC, or FW on my phone is affecting my phone so badly that people cant hear me like 88% of all calls? Like should i flash different FW, or reflash or use different CSC??
Is it possible that if I went with a locked TMO FW (or another) that I could possibly, maybe get better reception so folks can hear me better? Or hear me more often or more frequently?
How often do mics go bad or get dirty on these? Can a mic be cleaned?

I have been in the other Note 20 flashing thread but I am stuck. Tried so many ways but can't get the TMB csc to stick, always shows only XAA. I have TMO sim card too. Not sure if they blocked it on the newer releases of the phone
Has anyone tried Samkey to do this? Heard it only takes 1 credit but smallest amount of credits to purchase on ebay is 10 and I dont feel like investing more money into this effort