Develop Bugs

Restore original carrier software, with multi CSC rom to recover VoLTE

Hi, this is my first post. And im new on this teme of the Multi CSC roms.
I have a question, I get a ROM from SamMobile of my carrier Telcel in Mexico (TCE). I understand that the rom is multi csc, but when I flashed it all the bloatware (that in this case i need, VoLTE is only in my carrier) is from Claro (CHL), and I need it from Telcel. I sent a mail to SamMobile explaining this but they only answered me that the room its ok, the rom is multi CSC.
The CSC version that the system shows me is CHL/CHL/TCE, and I need TCE/TCE/TCE.
Anyone knows what I should do?

From my experience changing firmwares to enable volte, to fully restore csc it's flashing the firmware TCE, download from samfirm app on computer then factory reset from the firmware you have, flash TCE firmware with Odin and this it's the trick you need to have another carrier sim(no telcel) before flash the firmware TCE, wait for boot(don't put an account) when you are on the home screen turn off then enter recovery and factory reset and reboot, here when you swap the Sims, put the telcel sim on it and wait to fully boot and when you see the welcome screen you see a message that say the sim card it's different and need to reset, accept and wait for boot go to settings and check csc and now would be TCE\TCE\TCE

ALUCARD4DEAD said:
From my experience changing firmwares to enable volte, to fully restore csc it's flashing the firmware TCE, download from samfirm app on computer then factory reset from the firmware you have, flash TCE firmware with Odin and this it's the trick you need to have another carrier sim(no telcel) before flash the firmware TCE, wait for boot(don't put an account) when you are on the home screen turn off then enter recovery and factory reset and reboot, here when you swap the Sims, put the telcel sim on it and wait to fully boot and when you see the welcome screen you see a message that say the sim card it's different and need to reset, accept and wait for boot go to settings and check csc and now would be TCE\TCE\TCE
Click to expand...
Click to collapse
Do you really managed to change CSC from one operator (either one) to multi CSC ? And if you do so, can you make a guide for us?

pocos said:
Do you really managed to change CSC from one operator (either one) to multi CSC ? And if you do so, can you make a guide for us?
Click to expand...
Click to collapse
In my quest for fully change the csc without flash twrp and root to lose Knox warranty I ended with some smart guy that say the first two can be changed with flashing firmwares and the last one can only changed with root for that reason if you flash a different firmware region the two changed with the default csc on the multi csc and the last one stay same for example in this case MXO/MXO/TCE and the only way to return all the same it's using other carrier sim card temp until you flash the original firmware and then factory reset and when reboots swap sims putting the original carrier sim card in this particular case telcel

ALUCARD4DEAD said:
From my experience changing firmwares to enable volte, to fully restore csc it's flashing the firmware TCE, download from samfirm app on computer then factory reset from the firmware you have, flash TCE firmware with Odin and this it's the trick you need to have another carrier sim(no telcel) before flash the firmware TCE, wait for boot(don't put an account) when you are on the home screen turn off then enter recovery and factory reset and reboot, here when you swap the Sims, put the telcel sim on it and wait to fully boot and when you see the welcome screen you see a message that say the sim card it's different and need to reset, accept and wait for boot go to settings and check csc and now would be TCE\TCE\TCE
Click to expand...
Click to collapse
Thank you for your answer! But, let me see if I understood.
1- Put a sim from another carrier.
2- Factory Reset.
3- Flash the phone.
4- Turn on, and configure it.
5- Factory reset (again?)
6- Then put the Telcel SIM, before it starts completely
7- And finaly, in the "Welcome" screen, when the phone shows the message of the sim changed, perform another factory reset.
Let me know if I am right,
Right now I don't have another sim, i think that its rare that someone has another carrier But when I have it ill tell you what happenned

pocos said:
Do you really managed to change CSC from one operator (either one) to multi CSC ? And if you do so, can you make a guide for us?
Click to expand...
Click to collapse
al.rale said:
Thank you for your answer! But, let me see if I understood.
1- Put a sim from another carrier.
2- Factory Reset.
3- Flash the phone.
4- Turn on, and configure it.
5- Factory reset (again?)
6- Then put the Telcel SIM, before it starts completely
7- And finaly, in the "Welcome" screen, when the phone shows the message of the sim changed, perform another factory reset.
Let me know if I am right,
Right now I don't have another sim, i think that its rare that someone has another carrier But when I have it ill tell you what happenned
Click to expand...
Click to collapse
Yes basically that's the steps but in the step 5 it's important that you factory reset from recovery

ALUCARD4DEAD said:
Yes basically that's the steps but in the step 5 it's important that you factory reset from recovery
Click to expand...
Click to collapse
Hi,
At step 1 is any SIM or original CSC SIM?

pocos said:
Hi,
At step 1 is any SIM or original CSC SIM?
Click to expand...
Click to collapse
Depends what do you want to do.
In this particular case try to get original CSC TCE/TCE/TCE
He has CH/CH/TCE
If you wanna recover original CSC you need to have another carrier sim on step 1 and when you flash the original firmware go to recovery amd factory reset from there and when you put reboot in the process of boot you swap sims, put the original carrier, firmware sim

ALUCARD4DEAD said:
Depends what do you want to do.
In this particular case try to get original CSC TCE/TCE/TCE
He has CH/CH/TCE
If you wanna recover original CSC you need to have another carrier sim on step 1 and when you flash the original firmware go to recovery amd factory reset from there and when you put reboot in the process of boot you swap sims, put the original carrier, firmware sim
Click to expand...
Click to collapse
Actually I want to move from original CSC to another one!

ALUCARD4DEAD said:
Yes basically that's the steps but in the step 5 it's important that you factory reset from recovery
Click to expand...
Click to collapse
Do you know if the phone must be unlocked? I tried to do it but when I put the other sim, asks me for the carrier unlock code. The phone doesn't show me the message of the sim changed.
I've been some research and I found that Claro is Telcel in the rest of America Latina. Maybe its the reason that shows me Claro.
I tried the CSC secret code *#272*IMEI# and nothing happens, how i know if a ROM would let me do this?

pocos said:
Actually I want to move from original CSC to another one!
Click to expand...
Click to collapse
For that only flashing another firmware if you are from Mexico could you install MXO firmware it's the generic Mexican clean version and that you get MXO/MXO/TCE
The last one remains TCE this only can be change with root.
al.rale said:
Do you know if the phone must be unlocked? I tried to do it but when I put the other sim, asks me for the carrier unlock code. The phone doesn't show me the message of the sim changed.
I've been some research and I found that Claro is Telcel in the rest of America Latina. Maybe its the reason that shows me Claro.
I tried the CSC secret code *#272*IMEI# and nothing happens, how i know if a ROM would let me do this?
Click to expand...
Click to collapse
I don't try it with locked device, I think yes you needed unlocked, and yes claro it's from telcel what you have on your csc?

ALUCARD4DEAD said:
For that only flashing another firmware if you are from Mexico could you install MXO firmware it's the generic Mexican clean version and that you get MXO/MXO/TCE
The last one remains TCE this only can be change with root.
I don't try it with locked device, I think yes you needed unlocked, and yes claro it's from telcel what you have on your csc?
Click to expand...
Click to collapse
Actually I have the MXO/MXO/TCE, i've tried with the TCE rom, but still showing Claro. And these two roms doesn't allow the csc secret code. Don't you know what rom allows the csc secret code? I don't wanna try multiple roms from sammobile the download speeds are frustrating.

al.rale said:
Actually I have the MXO/MXO/TCE, i've tried with the TCE rom, but still showing Claro. And these two roms doesn't allow the csc secret code. Don't you know what rom allows the csc secret code? I don't wanna try multiple roms from sammobile the download speeds are frustrating.
Click to expand...
Click to collapse
Did you find anything? i have the same problem as you... when i dial the code, nothing happens i've tried on the ZTO, MXO and TCE

al.rale said:
Actually I have the MXO/MXO/TCE, i've tried with the TCE rom, but still showing Claro. And these two roms doesn't allow the csc secret code. Don't you know what rom allows the csc secret code? I don't wanna try multiple roms from sammobile the download speeds are frustrating.
Click to expand...
Click to collapse
Try download from samfirm it's more fastest download the full firmware it's pc exe.
Do you try the step mention above? With other sim factory reset from recovery and swap sims, when phone boots tells you the sim change and need to reset and then you get TCE/TCE/TCE

ALUCARD4DEAD said:
Try download from samfirm it's more fastest download the full firmware it's pc exe.
Do you try the step mention above? With other sim factory reset from recovery and swap sims, when phone boots tells you the sim change and need to reset and then you get TCE/TCE/TCE
Click to expand...
Click to collapse
Wow thank you! Im downloading it right now at 2.2 mb/s, compared with 100 kb/s of sammobile.
I tried anything and nothing works, I think that the unique solution is try with another OWA roms, I don't know if Telcel and Claro SIM's have similar identifiers and thats why returns me to Claro. Don't you know if there are roms with the csc menu activated?

TonyGzl92 said:
Did you find anything? i have the same problem as you... when i dial the code, nothing happens i've tried on the ZTO, MXO and TCE
Click to expand...
Click to collapse
Nope, do you think that the carrier lock relates with the problem?
Which sim carrier did you try?
Could I have problems if I try ATT or Movistar roms?

al.rale said:
Nope, do you think that the carrier lock relates with the problem?
Which sim carrier did you try?
Could I have problems if I try ATT or Movistar roms?
Click to expand...
Click to collapse
My phone was originally from att but I unlocked it and now use it on telcel and I want to use VoLTE with telcel. I would like to try the att or movistar firmwares but the problem is that (for what I've read) since the last att update was from like March the bootloader is older (v1) compared to telcel or MXO (v2) so you can't downgrade.
What carrier are you using? And what do you want it to be?

TonyGzl92 said:
My phone was originally from att but I unlocked it and now use it on telcel and I want to use VoLTE with telcel. I would like to try the att or movistar firmwares but the problem is that (for what I've read) since the last att update was from like March the bootloader is older (v1) compared to telcel or MXO (v2) so you can't downgrade.
What carrier are you using? And what do you want it to be?
Click to expand...
Click to collapse
As far I know to get VoLTE on telcel you need to buy phone directly with them, because uses the imei to enable that function
---------- Post added at 11:01 PM ---------- Previous post was at 10:59 PM ----------
al.rale said:
Wow thank you! Im downloading it right now at 2.2 mb/s, compared with 100 kb/s of sammobile.
I tried anything and nothing works, I think that the unique solution is try with another OWA roms, I don't know if Telcel and Claro SIM's have similar identifiers and thats why returns me to Claro. Don't you know if there are roms with the csc menu activated?
Click to expand...
Click to collapse
What firmware you already try?

ALUCARD4DEAD said:
As far I know to get VoLTE on telcel you need to buy phone directly with them, because uses the imei to enable that function
Click to expand...
Click to collapse
Yes, I thought so too, but the thing is I went to Telcel and asked and the told me that my phone SHOULD have VoLTE but I think that may be associated with my phone number, (since I've had that number for a long time), and not with the IMEI

S9 Message Your current software version isn't supported. Visit a service centre

Hi first post, please be gentle
I've got an s9 which is on EE UK, I flashed the phone with stock firmware, I did run into a couple of issues where when flashing the phone it got stuck on odm.img so I had to start again but using CSC and not home CSC so I lost everything
When the phone rebooted, it started up in German, so as I had my sim card in, it restarted in English
I'm using the following
G960FXXU2CSA2/G960FOXM2CSA2/G960FXXS2BRK3
Service provider SW SAOMC_SM-G960F_OXM_DBT_PP_0009
DBT/XEU/EVR
When I check for updates I get the following
Your current software version isn't supported. Visit a service centre
Can anyone help on how to put this right, I want to stay on stock firmware, not EE firmware
Thanks in advance

Good morning, I have a problem with my S9 model G9600 which came from the factory with the firmware of Hong Kong, however I tried to change the firmware for the one in Colombia because some voice services of the operators only work with the software of the country. But when trying to flash the part of CSC I mark the error and obviously the installation fails as in a kind of A brick because the logo of Galaxy S9 does not pass and is only solved by reinstalling the firmware with which it came from the factory; I have already made sure that the binary is the same, however I can not find a solution. I attach photos of the error.

dancevision said:
Hi first post, please be gentle
I've got an s9 which is on EE UK, I flashed the phone with stock firmware, I did run into a couple of issues where when flashing the phone it got stuck on odm.img so I had to start again but using CSC and not home CSC so I lost everything
When the phone rebooted, it started up in German, so as I had my sim card in, it restarted in English
I'm using the following
G960FXXU2CSA2/G960FOXM2CSA2/G960FXXS2BRK3
Service provider SW SAOMC_SM-G960F_OXM_DBT_PP_0009
DBT/XEU/EVR
When I check for updates I get the following
Your current software version isn't supported. Visit a service centre
Can anyone help on how to put this right, I want to stay on stock firmware, not EE firmware
Thanks in advance
Click to expand...
Click to collapse
You need to flash the XEU firmware, you have the German DBT firmware running right now

same issue, i have a hungarian telenor phone which suppoesed to be (PAN) , i flashed XEH which is hungarian, but it said software version not supported visit a support center , so i flashed the PAN 9.0 version and it still says this

Did you find any solution for this?

Bizzhub said:
Did you find any solution for this?
Click to expand...
Click to collapse
are you having an identical issue? i ask that because resolutions are very specific. Flashing firmware from www.sammobile.com/firmwares is very commonly the fix for a great many issues, but id hate to have you go thru the trouble of doing so if its not necessary

I tried flashing using odin but didnt work. btw, im using SM-965U and currently residing in Thailand. I dont know if this is the reason why I cant update at all.

S9 message
I am in the U.S. and am getting the message that software isn't supported also. Is there any resolution to this problem?

In case it helps, I was having this same issue with my unlocked Galaxy Note 10+. I found this thread after searching. I had gotten into this situation by flashing CP/AP/BL from TMO firmware without also flashing TMO's CSC or USERDATA. I avoided CSC/USERDATA (I was using the home CSC) because I wanted to avoid wiping the phone.
When I finally gave up and flashed CSC and USERDATA, everything was back to normal.

hueboy said:
I am in the U.S. and am getting the message that software isn't supported also. Is there any resolution to this problem?
Click to expand...
Click to collapse
have you tried flashing the stock firmware via Odin?
ThugEsquire said:
In case it helps, I was having this same issue with my unlocked Galaxy Note 10+. I found this thread after searching. I had gotten into this situation by flashing CP/AP/BL from TMO firmware without also flashing TMO's CSC or USERDATA. I avoided CSC/USERDATA (I was using the home CSC) because I wanted to avoid wiping the phone.
When I finally gave up and flashed CSC and USERDATA, everything was back to normal.
Click to expand...
Click to collapse
thats usually the fix. Glad you got it working
Bizzhub said:
I tried flashing using odin but didnt work. btw, im using SM-965U and currently residing in Thailand. I dont know if this is the reason why I cant update at all.
Click to expand...
Click to collapse
what is the issue after you flash in Odin?

Can't update to Android 9.0

I just bought samsung s9 SM-G960U but can't it won't update to android 9.0 manually ! it says processing failed
I did some researches I found that it's carrier-related . Some solutions suggests that I use odin to update but I can't choose the right firmware !
In fact :
- when I try to check the csc using *#1234# it show g960usqu2are6 ( I think it's Verizon using google)
- when I log on into samsung website and enter my imei . The product info shows that my carrier type is Sprint
- when I check "about phone/service Provider SW " on my phone the first line contains TMB after G960U and the third line is TGY/TGY/TGY
I'm confused but I want to update my s9 to android 9.0 . Help me

medbouzid said:
I just bought samsung s9 SM-G960U but can't it won't update to android 9.0 manually ! it says processing failed
I did some researches I found that it's carrier-related . Some solutions suggests that I use odin to update but I can't choose the right firmware !
In fact :
- when I try to check the csc using *#1234# it show g960usqu2are6 ( I think it's Verizon using google)
- when I log on into samsung website and enter my imei . The product info shows that my carrier type is Sprint
- when I check "about phone/service Provider SW " on my phone the first line contains TMB after G960U and the third line is TGY/TGY/TGY
I'm confused but I want to update my s9 to android 9.0 . Help me
Click to expand...
Click to collapse
get the firmware here
https://www.sammobile.com/firmwares/galaxy-s9/SM-G960U/VZW/download/G960USQU4CSC7/265795/
get the most recent version of Odin (i didnt source you a link for that)
open Odin on your computer
unzip the package and get your phone into download mode, connecting it to your computer. Allow drivers to install and when Odin recognizes your device by showing a random number in the port field. Then place the files in their corresponding spots in Odin paying attention to which CSC file you use as one factory resets the phone and the other simply applies the update. It is recommended to use the factory reset CSC when changing from different iterations of the Android OS. Press the start button, allow it to full run the firmware push. It will then automagically reboot (yes, automagically), and youre done.

youdoofus said:
get the firmware here
get the most recent version of Odin (i didnt source you a link for that)
open Odin on your computer
unzip the package and get your phone into download mode, connecting it to your computer. Allow drivers to install and when Odin recognizes your device by showing a random number in the port field. Then place the files in their corresponding spots in Odin paying attention to which CSC file you use as one factory resets the phone and the other simply applies the update. It is recommended to use the factory reset CSC when changing from different iterations of the Android OS. Press the start button, allow it to full run the firmware push. It will then automagically reboot (yes, automagically), and youre done.
Click to expand...
Click to collapse
I don't live in US or America , is it okay that I use verizon update ? is there any risk that the the phone would be locked or something like that ?

medbouzid said:
I don't live in US or America , is it okay that I use verizon update ? is there any risk that the the phone would be locked or something like that ?
Click to expand...
Click to collapse
Once a phone is unlocked, it stays that way forever. Firmware has nothing to do with a phone's locked or unlock status.

joeldf said:
Once a phone is unlocked, it stays that way forever. Firmware has nothing to do with a phone's locked or unlock status.
Click to expand...
Click to collapse
Depends how it was unlocked, seen a few members flash new firmware and the phone is SIM locked again, these unlock companies must use some modification to the firmware rather than unlocking it properly

*Detection* said:
Depends how it was unlocked, seen a few members flash new firmware and the phone is SIM locked again, these unlock companies must use some modification to the firmware rather than unlocking it properly
Click to expand...
Click to collapse
Good to know. Wasn't aware that a phone could be unlocked with firmware alone. I guess it's a temporary overlay or something that "fakes" being unlocked?

joeldf said:
Good to know. Wasn't aware that a phone could be unlocked with firmware alone. I guess it's a temporary overlay or something that "fakes" being unlocked?
Click to expand...
Click to collapse
Yea must be something that emulates the unlock somehow but once reset or flashed it's gone, always seems to be people who have bought the phone second hand unlocked, it has worked fine with their sim until they reset or flash different firmware, then it's locked again

No network on device after firmware update
*Detection* said:
[/COLOR]
[/COLOR]
Yea must be something that emulates the unlock somehow but once reset or flashed it's gone, always seems to be people who have bought the phone second hand unlocked, it has worked fine with their sim until they reset or flash different firmware, then it's locked again
Click to expand...
Click to collapse
i am have lost the network on my s9 g960u after an update to android 9 using Odin, tried changing the firmwares to the different ones on the sammobile website, but there is no changes on it, can someone assist on how i can get the network back, it shows FINAL IMER CERT: Fail. someone please help

Odala11 said:
i am have lost the network on my s9 g960u after an update to android 9 using Odin, tried changing the firmwares to the different ones on the sammobile website, but there is no changes on it, can someone assist on how i can get the network back, it shows FINAL IMER CERT: Fail. someone please help
Click to expand...
Click to collapse
what does the phone do when you enter *#06# in the dialer?

No network on device after firmware update
Youdoofus said:
what does the phone do when you enter *#06# in the dialer?
Click to expand...
Click to collapse
i get the imei # 3533*********/**

Odala11 said:
i get the imei # 353xxxxx /xx
Click to expand...
Click to collapse
NEVER provide the IMEI number in public!

spamtrash said:
NEVER provide the IMEI number in public!
Click to expand...
Click to collapse
Thanks:good:

Odala11 said:
i get the imei # 3533*********/**
Click to expand...
Click to collapse
sorry, i should have worded that differently. I didnt need the IMEI, just the fact that the IMEI is what came up and that a valid IMEI shows

Youdoofus said:
sorry, i should have worded that differently. I didnt need the IMEI, just the fact that the IMEI is what came up and that a valid IMEI shows
Click to expand...
Click to collapse
I have a a valid Imei, i have tried different firmwares from:
https://www.sammobile.com/samsung/galaxy-s9/firmware/SM-G960U/VZW/download/
Even after that, when i dial *#0011#, i get the FINAL IMEI Certi: Fail
Hope someone here has a solution for this

Cant Update My S9
I bought this phone about 5 months now and I haven't recieve any update up until this day
My phone baseband version is G960USQU2ARE6
Can someone please help me

Odala11 said:
I have a a valid Imei, i have tried different firmwares from:
https://www.sammobile.com/samsung/galaxy-s9/firmware/SM-G960U/VZW/download/
Even after that, when i dial *#0011#, i get the FINAL IMEI Certi: Fail
Hope someone here has a solution for this
Click to expand...
Click to collapse
i havent tried this method, but i did stumble across this
Boot your Samsung Galaxy S9 or Galaxy S9 Plus
Activate then access the USB debugging mode
Sync your Samsung Galaxy S9 or Galaxy S9 Plus to your desktop PC
Download this: EFS Restorer Express
Access the application and then open the EFS-BACK.BAT file
Choose a method in order to recover the EFS via Odin
https://www.techjunkie.com/how-to-repair-galaxy-s9-imei-number-problem/

flashing the unbranded KOO csc on my korean G960N device still shows KTC bloatware

I have a Korean G960N device that has a lot of KT carrier bloatware, so I decided to flash a KOO unbranded Korean firmware, however even after flashing is successful the device still shows KT logo, bloatware, and several KT-related options in the 'Settings' app, as well as KTC in the "about device" option. how do I get rid of this ****.

Coomer91 said:
I have a Korean G960N device that has a lot of KT carrier bloatware, so I decided to flash a KOO unbranded Korean firmware, however even after flashing is successful the device still shows KT logo, bloatware, and several KT-related options in the 'Settings' app, as well as KTC in the "about device" option. how do I get rid of this ****.
Click to expand...
Click to collapse
flash the CSC not the HOME_CSC. The CSC file will factory reset it and remove any remnants of the previous carrier info including bootanimation, splash screen etc etc

Youdoofus said:
flash the CSC not the HOME_CSC. The CSC file will factory reset it and remove any remnants of the previous carrier info including bootanimation, splash screen etc etc
Click to expand...
Click to collapse
I know, and I did, and still shows KTC bloat including logo. I saw other people posting about the problem in other samsung device forums but didn't find an explanation. I wish there was a unified forum for these general samsung issues, so that they'll get the largest amount of attention possible.

Coomer91 said:
I know, and I did, and still shows KTC bloat including logo. I saw other people posting about the problem in other samsung device forums but didn't find an explanation. I wish there was a unified forum for these general samsung issues, so that they'll get the largest amount of attention possible.
Click to expand...
Click to collapse
can you grab a multi csc and flash it without the sim card in it?

Youdoofus said:
can you grab a multi csc and flash it without the sim card in it?
Click to expand...
Click to collapse
lel, I've been trying to flash an international firmware for 6 months now without success, it's always some damn PIT error, tried everything Patched Odin, with PIT file, without PIT file, with NAND erase, without NAND erase, EVERYTHING, and none of it works, and no one on the internet confirmed that flashing an international G960F firmware on a Korean G960N device actually succeeds. just check my post history to see all the posts I made about the issue.

Coomer91 said:
lel, I've been trying to flash an international firmware for 6 months now without success, it's always some damn PIT error, tried everything Patched Odin, with PIT file, without PIT file, with NAND erase, without NAND erase, EVERYTHING, and none of it works, and no one on the internet confirmed that flashing an international G960F firmware on a Korean G960N device actually succeeds. just check my post history to see all the posts I made about the issue.
Click to expand...
Click to collapse
doesnt surprise me that the F firmware worked on a N device at all. Both are Exynos chipsets, so there isnt really a reason for it to not work. 6 months you say? @AthieN have any ideas?

Youdoofus said:
doesnt surprise me that the F firmware worked on a N device at all. Both are Exynos chipsets, so there isnt really a reason for it to not work. 6 months you say? @AthieN have any ideas?
Click to expand...
Click to collapse
Either the firmware being flashed is mislabeled, or it's not truly flashing. I've seen where Odin says it was successful, but not really... That could be a whole different set of reasons why it's not working though.
My suggestion is re-download the firmware, from a trusted source and try again.

i'm having the same issue as the first post , i have a s10e sm-g970n and it's on sk telecom carrier sh*** , it doesn't want to dissapear even by using the KOO firmware (G970NKSU3BSKO) it's driving me crazy ! this was already in KOO firmware before i tried the custom recovery and custom rom and all , now i just want to go STOCK and this isn't willing to install a stock version without sk telesh*** without bloot ... anyone can help me ?

225franc said:
i'm having the same issue as the first post , i have a s10e sm-g970n and it's on sk telecom carrier sh*** , it doesn't want to dissapear even by using the KOO firmware (G970NKSU3BSKO) it's driving me crazy ! this was already in KOO firmware before i tried the custom recovery and custom rom and all , now i just want to go STOCK and this isn't willing to install a stock version without sk telesh*** without bloot ... anyone can help me ?
Click to expand...
Click to collapse
often times the phone is being told what carrier youre on by the sim card, then if the phone has that carriers CSC in its internal database (in the case of multi-CSC firmware sets) the phone will recognize the carrier and then install the carrier specific crap. I use the U1 firmware and dont have any of the carrier junk that it originally came with. I got it on a Cricket offer and very quickly got rid of all the Cricket junk by flashing the U1 firmware

I successfully changed CSC to KOO on my G960N after it was SKT to do that i had to
- root the device
- install phone info app
- use the tool to change csc
You will have a choice of 4 CSCs choose KOO and install
PS : backup data as it will be erased

numpea said:
I successfully changed CSC to KOO on my G960N after it was SKT to do that i had to
- root the device
- install phone info app
- use the tool to change csc
You will have a choice of 4 CSCs choose KOO and install
PS : backup data as it will be erased
Click to expand...
Click to collapse
Thanks again for this help bro , i already forgot about the csc code changing , only thing who were annoying to me were the SKC blootware and bootanimation
i succefully uninstalled the blootware after rooting and using root uninstaller pro , then about the bootanimation i couldn't find any way to change (even by changing files into system/media/ ) , so i just left it
but good thing you gave us the steps , maybe it will help one guy who is willing to change his CSC code

225franc said:
Thanks again for this help bro , i already forgot about the csc code changing , only thing who were annoying to me were the SKC blootware and bootanimation
i succefully uninstalled the blootware after rooting and using root uninstaller pro , then about the bootanimation i couldn't find any way to change (even by changing files into system/media/ ) , so i just left it
but good thing you gave us the steps , maybe it will help one guy who is willing to change his CSC code
Click to expand...
Click to collapse
When you change the csc code to KOO it will be as an european model the bootanimation will normal and the settings page will be as normal as it can be without korean trach

numpea said:
When you change the csc code to KOO it will be as an european model the bootanimation will normal and the settings page will be as normal as it can be without korean trach
Click to expand...
Click to collapse
Will i loose the magisk root if i change the csc code ?
Also can TWRP be installed when Magisk is there ?

225franc said:
Will i loose the magisk root if i change the csc code ?
Also can TWRP be installed when Magisk is there ?
Click to expand...
Click to collapse
Do a backup with twrp when you change csc it will erase data and you will loose magisk all you have to do is go back to recovery and restore the backup ( backup only data )
Twrpcan always be installed with odin with or without magisk

Alright bro , thx again for the help !

Hello everyone. So I have a S20 Ultra SM-G988N. Its a Korean variant with a Snapdragon Chipset. It has the option OEM unlock and all so the device is rooted. I also was able to change my CSC without doing a data wipe...
What I did was go into the root of the phone into /ets/imei/mps_code.dat. I opened that file with text editor. For me it came up empty so I added the text "KOO" with a different text editor because the one provided by my Root Explorer wasn't letting me edit it. Once I added that in I restarted my phone. My phone started up, had the regular Samsung Logo. But if course some of the blostware is there.
My big issue is the phone connects to Korean things as in some apps will say my Region is Korean. For example my Weather widget (Samsung App) would only let me pick location by state, or country. I can't choose the town I live in nor does the app knows my correct location. It would say I'm in Bethpage Korea.
So my question is because the SM-G988N has a Snapdragon Chipset, would I be able to Flash an U1 Variant Home CSC Using Odin? This way I have multiple CSCs which I can then use to debloat and get the phone to be like US Version.

Coomer91 said:
I have a Korean G960N device that has a lot of KT carrier bloatware, so I decided to flash a KOO unbranded Korean firmware, however even after flashing is successful the device still shows KT logo, bloatware, and several KT-related options in the 'Settings' app, as well as KTC in the "about device" option. how do I get rid of this ****.
Click to expand...
Click to collapse
hi do you know where i can download that firmware which shows KT logo i searched everywhere but i couldn't find always shows SKC

numpea said:
I successfully changed CSC to KOO on my G960N after it was SKT to do that i had to
- root the device
- install phone info app
- use the tool to change csc
You will have a choice of 4 CSCs choose KOO and install
PS : backup data as it will be erased
Click to expand...
Click to collapse
Thank you for your share. I did the same process as you, but in the phone info app, when i select "Change CSC" it deliver this message: Try opening secret code... then nothing shows up. I'm glad if you could help
THanks

BChamp said:
Hello everyone. So I have a S20 Ultra SM-G988N. Its a Korean variant with a Snapdragon Chipset. It has the option OEM unlock and all so the device is rooted. I also was able to change my CSC without doing a data wipe...
What I did was go into the root of the phone into /ets/imei/mps_code.dat. I opened that file with text editor. For me it came up empty so I added the text "KOO" with a different text editor because the one provided by my Root Explorer wasn't letting me edit it. Once I added that in I restarted my phone. My phone started up, had the regular Samsung Logo. But if course some of the blostware is there.
My big issue is the phone connects to Korean things as in some apps will say my Region is Korean. For example my Weather widget (Samsung App) would only let me pick location by state, or country. I can't choose the town I live in nor does the app knows my correct location. It would say I'm in Bethpage Korea.
So my question is because the SM-G988N has a Snapdragon Chipset, would I be able to Flash an U1 Variant Home CSC Using Odin? This way I have multiple CSCs which I can then use to debloat and get the phone to be like US Version.
Click to expand...
Click to collapse
yes it works, I did the same on an S20FE Korean version, Root + unlock BL needed though.

saoudien07 said:
yes it works, I did the same on an S20FE Korean version, Root + unlock BL needed though.
Click to expand...
Click to collapse
if i want to flash in KOO Flash pack, is it necessary to unlock bootloader and root? Is there any way to be able to root without losing Samsung Knox?

Samsung S20 SM-G981B = THREE

Ok
I have a Samsung S20 which is unlocked but originally using THREE Network. I have the Original Firmware downloaded already for either VODAFONE or BTU. I also have installed TWRP and MAGISK. I also have Flashed with Up Parim Tar to get rid of the Bootloader Open etc.
What I want to Know is, I want to change the Boot Logo from THREE to either VODAFONE or BTU. I originally Flashed the BTU in the hope it would remove the THREE details but it has not.
I have read a little but thought Id ask here for some help. I have read to use patched ODIN and HOME CSC to keep all my data and settings and flash with either VODAFONE or BTU and it should change the Carrier and keep my settings so just reboot and it will change the details. Or have I got this wrong? Hopefully someone can assist.
What I am aiming for is to change the THREE boot ups, keep root and change to either VODAFONE or BTU, preferably without having to wipe the data but if I do I will have to. Just not sure which CSC to use and procedure to do this. Thanks in advance. . .