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Finally working method for enabling VoLTE on S7 Edge on latest BTU firmware (no root)

Hello Guys. I've been playing around with all available nougat firmwares to get volte working. I succeded using latest BTU firmware and beta 1 files.
I'm not responsible for any issues with phone after using this tutorial. Use at your own risk.
With this configuration Shealth doesn't work. It says device has been compromised. Knox is not tripped but probably the cause is a mix of firmware files from different builds. I am looking for a fix but for now you have to sacrifice Shealth if you want VoLTE working on BTU firmware. Flashing full BTU firmware back is restoring Shealth functionality.
UPDATE - After flashing back DQB3 bootloader VoLTE stays and Shealth start working So flash DQB3 bootloader and DQB1 cp file at the very end to get everything working!!
This tutorial is temporary solution until branded operator firmwares will be released.
So what we need:
Official latest nougat full firmware - DQB3 at the moment
Beta 1 BL, CP, CSC files
Odin
Samfirm
To get VoLTE working follow these steps:
Enable oem unlock so you can use odin to flash firmwares (oem unlock is in developer options - enable them tapping About device/software info/Build number few times).
Flash full latest Nougat BTU firmware - (available on samfirm)
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After flashing completed, skip all configuration because phone will be factory resetted again when you flash beta files. Now flash Nougat beta BL, CP, CSC which are available here: Beta files
After flashing configure phone as normal (i skipped restore settings in samsung cloud just in case of something overwritten).
Flash back Stock Nougat DQB3 bootloader.
Enjoy working VoLTE on latest BTU firmware
If I helped you, click thanks button

Thanks I'm doing this later.
If I'm already running on DBQ3 do I need to do the first bit?

thanks bro.... turkey s7 edge developers

VoLTE being enabled is in the CSC file only
There is no need to do this double flashing technique.
Stock Nougat BL
Stock Nougat AP
Stock Nougat CP
BETA 1 CSC
One time flash, finished

Galactus said:
VoLTE being enabled is in the CSC file only
There is no need to do this double flashing technique.
Stock Nougat BL
Stock Nougat AP
Stock Nougat CP
BETA 1 CSC
One time flash, finished
Click to expand...
Click to collapse
nope, i tried many times. Only flashing csc doesn't bring me volte. Only when i did what i stated in tutorial volte started working. So looks like if it working in your case doesn't mean it will work for all people. My method will i believe

chrissyyyw said:
Thanks I'm doing this later.
If I'm already running on DBQ3 do I need to do the first bit?
Click to expand...
Click to collapse
No need, flash bl cp csc only. It will reset your phone.

Pichulec said:
nope, i tried many times. Only flashing csc doesn't bring me volte. Only when i did what i stated in tutorial volte started working. So looks like if it working in your case doesn't mean it will work for all people. My method will i believe
Click to expand...
Click to collapse
Strange, flashing Nougat files + BETA 1 CSC once has worked for other people in the EE thread. It is well known that all the code needed to enable VoLTE and WiFi calling sits in the CSC file, hence why most guides suggest you flash all 4 files in ODIN but use the CSC file of your choice for carrier settings. If the user is rooted, simply extracting the CSC folders from the CSC image and dropping it into /system is enough and doesn't require any specific ODIN flashed bootloader or modem file.
Mixing different system image and bootloader files isn't really recommended

Galactus said:
Strange, flashing Nougat files + BETA 1 CSC once has worked for other people in the EE thread. It is well known that all the code needed to enable VoLTE and WiFi calling sits in the CSC file, hence why most guides suggest you flash all 4 files in ODIN but use the CSC file of your choice for carrier settings. If the user is rooted, simply extracting the CSC folders from the CSC image and dropping it into /system is enough and doesn't require any specific ODIN flashed bootloader or modem file.
Mixing different system image and bootloader files isn't really recommended
Click to expand...
Click to collapse
I've got the latest DBQ3 Nougat BTU firmware on my S7 Edge at the moment. If I flash BETA 1 BL, CP and CSC is there a chance i'll brick it?

chrissyyyw said:
I've got the latest DBQ3 Nougat BTU firmware on my S7 Edge at the moment. If I flash BETA 1 BL, CP and CSC is there a chance i'll brick it?
Click to expand...
Click to collapse
Nope, it's working fine. Tested on my device.
Update in the first post!! S health is working

For testing purposes i flashed as well DQB1 CP file, volte still works.

Pichulec said:
For testing purposes i flashed as well DQB1 CP file, volte still works.
Click to expand...
Click to collapse
Like I said before, of course it would. VoLTE does not depend on the modem or the bootloader.
ALL of the code enabling VoLTE is in the CSC file

I have followed instructions on post 1 on my s7 edge dual sim on 3UK but still not getting Volte - can anyone help?

It is hard to say why you not getting it. Solution worked in my case but im on EE uk. I tried hard and no other solution worked for me.
Did you flash full dqb3 rom first? And then those 3 files?

Flashed from MM to Nougat, with original BTU file from sammobile and VoLTE worked in an instant.
so i think it the depends on where you live

Pichulec said:
It is hard to say why you not getting it. Solution worked in my case but im on EE uk. I tried hard and no other solution worked for me.
Did you flash full dqb3 rom first? And then those 3 files?
Click to expand...
Click to collapse
Yes I did. Is there an option you need to activate within the software?

Nope, it should activate itself when available.

Pichulec said:
Nope, it should activate itself when available.
Click to expand...
Click to collapse
Are you using a dual sim s7 edge?

no

Hi. Do we have any solutions for S7 Edge TMobile being used in India?? I bought 935T wasnt able to use volte, flashed 935U still unable to use volte. Currently using a work around of using a carrier app VoiceJio to make and recve calls... Any solutions on how to gt the volte working in India??? Please help..

This is snapdragon device, i cant help you my friend.

[Help] Changing Service Provider SW

Hey guys, I bought my s8+ 955FD in Thailand, and no matter what I flash the initial language is always Thai, the Google Playstore is always set to Thailand, what I realised is that the Service provider SW ver in software information is always set TH/TH/TH, is there any way to change this?

Yes there is. Find a CSC package which contains the country language you wish. Make sure the CSC package is for the same version of your overall phone, which if stock may be a 950F, or what ever. flash the CSC with Odin. Do not use the Home CSC from the package, as what will leave your CSC as TH. Some folks have talked about with new phones you need to get a SIM card from the local where the phone was 'meant' to be used, and use if for 5 minutes, so that will effect the 'unlock' ability to be used for other regions. Check into that, as well.
If you decide to change the overall software on the phone, 'F' packages seem to work pretty well. If you do decide to flash an F ROM, you also need to flash an 'F' CSC (multi) package, where you can select the country you wish and the carrier from the install dialogue.
Often the preferred installer for custom ROMS seems to be Aroma, as it is a very flexible installer for ROMs and about anything you can think of to add onto or into a ROM can be incorporated into the Aroma installer.
If you are not going to use a custom ROM, then you will flash a CSC package from Odin, but again, first check to see if you must use your phone for 5 minutes from the SIM local.

JeffDC said:
Yes there is. Find a CSC package which contains the country language you wish. Make sure the CSC package is for the same version of your overall phone, which if stock may be a 950F, or what ever. flash the CSC with Odin. Do not use the Home CSC from the package, as what will leave your CSC as TH. Some folks have talked about with new phones you need to get a SIM card from the local where the phone was 'meant' to be used, and use if for 5 minutes, so that will effect the 'unlock' ability to be used for other regions. Check into that, as well.
If you decide to change the overall software on the phone, 'F' packages seem to work pretty well. If you do decide to flash an F ROM, you also need to flash an 'F' CSC (multi) package, where you can select the country you wish and the carrier from the install dialogue.
Often the preferred installer for custom ROMS seems to be Aroma, as it is a very flexible installer for ROMs and about anything you can think of to add onto or into a ROM can be incorporated into the Aroma installer.
If you are not going to use a custom ROM, then you will flash a CSC package from Odin, but again, first check to see if you must use your phone for 5 minutes from the SIM local.
Click to expand...
Click to collapse
I have flashed multiple stock roms with their respective CSC and it does not work that was my question

Have you used the phone for 5 minutes within the originating region?
"Some folks have talked about with new phones you need to get a SIM card from the local where the phone was 'meant' to be used, and use if for 5 minutes" . . . in order to functionally unlock it for out of the region use. Is your software that version?
When you flash the phone, what SIM is inside the phone before the reboot?
Are you rooted? If so flash via TWRP and a CSC which has an Aroma installer.
What else can you tell us about the specifics of your phone?
If you re-flash the OEM firmware, or when your first setup new, do you get any language options on the start setup page, besides Thai?

JeffDC said:
Have you used the phone for 5 minutes within the originating region?
"Some folks have talked about with new phones you need to get a SIM card from the local where the phone was 'meant' to be used, and use if for 5 minutes" . . . in order to functionally unlock it for out of the region use. Is your software that version?
When you flash the phone, what SIM is inside the phone before the reboot?
Are you rooted? If so flash via TWRP and a CSC which has an Aroma installer.
What else can you tell us about the specifics of your phone?
If you re-flash the OEM firmware, or when your first setup new, do you get any language options on the start setup page, besides Thai?
Click to expand...
Click to collapse
Dear Jeff, thank you for the help and the follow-up. I have managed to change it partially by inserting a new SIM from the new country(Brazil) and when I did so, it asked me for a reset and I went through with it, now it's ZTO/ZTO/THL ---- so the first two changed to Brazilian CSC but the third one is still THL, any thoughts? what's the difference between the 3? And yes I had used it for a lot longer than 5 minutes when I was in Thailand. I just want to get a clean install without any remnants from THL - I am currently on CRAP/CRB7 - Waiting the 7 needed days to get OEM unlock and be able to flash TWRP(from what I understood), please tell me what to do to get rid of the THL from my phone completely. Thank you So much

Once rooted, find a multi-CSC package with your country and flash it (again). You might need to flash the baseband, so I'd look into that, as well.
On an S7 from with a Chinese CSC, once I found a custom ROM, , I flashed TWRP in Odin, booted into TWRP/recovery, flashed the custom ROM, verity and SU, and then flashed a multi-CSC package Aroma package, mine lost all the Chinese info.
Sure would be great if these phone companies would just give us unlocked phones, with straight forward methods to make these simple changes. I think most folks would pay a little extra for the ability.

Hi Louayd. Did you fix this issue?
I'm passing the same problem with S9+. I bought in Portugal and trying to use in Brazil. I can't root phone because my intention is use the Samsung Pay and it with rooted phone it doesn't work.

I am facing the same issue. I bought Note9 from Singapore from M1 Operator. I have flashed different countries ROMs but my phone always keep some bloatware from M1 Singapore and the "Service Provider SW Ver" always show MM1/MM1,MM1/XSP despite whatever country/region Stock ROM I flashed. My phone is already OEM Unlocked.
Need support if anyone has managed to change it.
I do not have Original Country SIM to test as mentioned above. I bought it from Singapore and wanted to use it in Cambodia. Right now VoLTE functionality is not working.
I tried to use ShortcutMaster app also but it is also not able to show anything under IMS Service and Settings.
Regards,

Can i flash csc of samsung a750f on a750gn??
Basically i need call recording which is not supported in 750gn , but available in 750f..

Galaxy A51 2020
JeffDC said:
Yes there is. Find a CSC package which contains the country language you wish. Make sure the CSC package is for the same version of your overall phone, which if stock may be a 950F, or what ever. flash the CSC with Odin. Do not use the Home CSC from the package, as what will leave your CSC as TH. Some folks have talked about with new phones you need to get a SIM card from the local where the phone was 'meant' to be used, and use if for 5 minutes, so that will effect the 'unlock' ability to be used for other regions. Check into that, as well.
If you decide to change the overall software on the phone, 'F' packages seem to work pretty well. If you do decide to flash an F ROM, you also need to flash an 'F' CSC (multi) package, where you can select the country you wish and the carrier from the install dialogue.
Often the preferred installer for custom ROMS seems to be Aroma, as it is a very flexible installer for ROMs and about anything you can think of to add onto or into a ROM can be incorporated into the Aroma installer.
If you are not going to use a custom ROM, then you will flash a CSC package from Odin, but again, first check to see if you must use your phone for 5 minutes from the SIM local.
Click to expand...
Click to collapse
I have this issue i installed firmware SM-A515F Greece EUR from sammobile but is still Service provider ver. in SER but of Greece EUR firmware has been installed normally but in the Service provider ver. not change to Greece EUR
how to fix this?

JeffDC said:
Yes there is. Find a CSC package which contains the country language you wish. Make sure the CSC package is for the same version of your overall phone, which if stock may be a 950F, or what ever. flash the CSC with Odin. Do not use the Home CSC from the package, as what will leave your CSC as TH. Some folks have talked about with new phones you need to get a SIM card from the local where the phone was 'meant' to be used, and use if for 5 minutes, so that will effect the 'unlock' ability to be used for other regions. Check into that, as well.
If you decide to change the overall software on the phone, 'F' packages seem to work pretty well. If you do decide to flash an F ROM, you also need to flash an 'F' CSC (multi) package, where you can select the country you wish and the carrier from the install dialogue.
Often the preferred installer for custom ROMS seems to be Aroma, as it is a very flexible installer for ROMs and about anything you can think of to add onto or into a ROM can be incorporated into the Aroma installer.
If you are not going to use a custom ROM, then you will flash a CSC package from Odin, but again, first check to see if you must use your phone for 5 minutes from the SIM local.
Click to expand...
Click to collapse
I installed firmware SM-A515F EUR from sammobile but is still Service provider ver. in SER but Of Greece EUR CSC has been installed but in the Service provider ver. not change to Greece EUR
how to fix this?
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Question CSC change S21 Plus

I just upgraded from a S10 Plus to a new S21 Plus , Sdcard fiasco apart is a great phone..
My question is regarding changing the csc on the phone , with my old phone if you flashed a rom ( with CSC not home_csc) or factory reset and introduced a SIM card it will take the CSC according the SIM card and network... for example if the phone was TPA/TPA/PCW and i flashed a rom or do a factory reset with a spanish ( Spain) SIM i would get a PHE/PHE/PCW , it was like that every time
Is not like that with my S21 plus , the CSC on my phone is GTO/GTO,GTO/GTO (dual SIM) I flashed an OXM firmware ( latest march) and introduced a Panama SIM (TPA) i was expecting a change to TPA/TPA,TPA/GTO but it did not change stayed with GTO/GTO,GTO/GTO , tried couple times , factory reset from Android , from recovery , no luck.
What changed?? I am doing something wrong

MAX 404 said:
I just upgraded from a S10 Plus to a new S21 Plus , Sdcard fiasco apart is a great phone..
My question is regarding changing the csc on the phone , with my old phone if you flashed a rom ( with CSC not home_csc) or factory reset and introduced a SIM card it will take the CSC according the SIM card and network... for example if the phone was TPA/TPA/PCW and i flashed a rom or do a factory reset with a spanish ( Spain) SIM i would get a PHE/PHE/PCW , it was like that every time
Is not like that with my S21 plus , the CSC on my phone is GTO/GTO,GTO/GTO (dual SIM) I flashed an OXM firmware ( latest march) and introduced a Panama SIM (TPA) i was expecting a change to TPA/TPA,TPA/GTO but it did not change stayed with GTO/GTO,GTO/GTO , tried couple times , factory reset from Android , from recovery , no luck.
What changed?? I am doing something wrong
Click to expand...
Click to collapse
First of all root phone, download root Explorer then open it change to r/w and go to efs/imei then change these 3 files to ur desired code. Then download latest firmware using frija meanwhile go to dev settings and Lock OEM. Flash downloaded firmware are yep that OXM with CSC file to wipe all data. Voila ur s21+ my dear friend is debranded permamently. After that start using magisk and be happy with ur phone.
My s21+ was TPL/TPL/TPL/EUX/TPL
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Last line of CSC cannot change its on mobo but its not a problem i was able to register and download latest UBB patch via ota after clean flash. Still always patch AP with magisk app when new firmware came out then use all files with home_csc in odin. In case of new firmware comes out and u want upgrade already magsked phone.

Hi @Ziomus
Thanks for the help , I should had been more specific , I know is possible when you are rooted , I just wonder if is still possible when you are not , before was possible...

Ziomus said:
First of all root phone, download root Explorer then open it change to r/w and go to efs/imei then change these 3 files to ur desired code. Then download latest firmware using frija meanwhile go to dev settings and Lock OEM. Flash downloaded firmware are yep that OXM with CSC file to wipe all data. Voila ur s21+ my dear friend is debranded permamently. After that start using magisk and be happy with ur phone.
My s21+ was TPL/TPL/TPL/EUX/TPL
View attachment 5246233
Last line of CSC cannot change its on mobo but its not a problem i was able to register and download latest UBB patch via ota after clean flash. Still always patch AP with magisk app when new firmware came out then use all files with home_csc in odin. In case of new firmware comes out and u want upgrade already magsked phone
Click to expand...
Click to collapse
Hello. is that a mistake ?Lock oem ? or you meant unlock oem ? I am trying to unlock my S21plus SM-G9960 ):

Yes Just Lock OEM for first clean flash after changing code in these files. Then after u skip init setup (data on by whole proces dont need add Google or samsung account) ur phone will be registered with new CSC in ota updates. Then no matter what u do and what you flash in odin new CSC stay
P.S There is no problem with OEM Lock after rootimg phone ive locked OEM for daily use.

Ziomus said:
Yes Just Lock OEM for first clean flash after changing code in these files. Then after u skip init setup (data on by whole proces dont need add Google or samsung account) ur phone will be registered with new CSC in ota updates. Then no matter what u do and what you flash in odin new CSC stay
P.S There is no problem with OEM Lock after rootimg phone ive locked OEM for daily use.
Click to expand...
Click to collapse
Thanks . Please help with following
Q1) I have S21 Plus SM-G9960/DS, Snapdragon variant. I rooted it and installed magisk. Also changed mps_code.dat, omcnw_code.dat and omcnw_code2.dat to ILO . or should I set to some other CSC ?
Q2) after that i should lock the oem . thats mean shutdow, and go to DOwnload mode, long press volume up and lock the OEM from there ? because in dev I cannot see any way to lock the oem.
Please advise
Thanks

shayan101 said:
Thanks . Please help with following
Q1) I have S21 Plus SM-G9960/DS, Snapdragon variant. I rooted it and installed magisk. Also changed mps_code.dat, omcnw_code.dat and omcnw_code2.dat to ILO . or should I set to some other CSC ?
Q2) after that i should lock the oem . thats mean shutdow, and go to DOwnload mode, long press volume up and lock the OEM from there ? because in dev I cannot see any way to lock the oem.
Please advise
Thanks
Click to expand...
Click to collapse
Sorry mate, Just add ur Google account and samsung install Google. Play updates reboot then OEM Lock should be get rid of Grey. You need add account to made frp Lock on.
Meanwhile check ur kg state in odin should be checking. Not broken!! If broken wipe phone without any account on it and flash Stock firmware check kg state shoud be checking. Kg state checking means that you can Lock OEM magisked phone. Dont worry u can always fix broken state if u see it
Ah if u see Grey OEM Lock that means u need add Google account and samsung for sure and your OEM Lock is checking So its fine i suppose . If kg state is broken u should not see OEM Lock option am i right XD? Kg state can be broken when u wipe data via recovery while Google account is addedo. So i bet ur kg state is checking now u need only add accounts and try reboot maybe a while too. Sorry i smoke a lot of weed xddd
Conider that you do e everything ok when your Phone is rooted with magisk safety net looks like this, and you Lock your OEM So half baked protection of frp still working. You can do this all with kg state

Ziomus said:
Sorry mate, Just add ur Google account and samsung install Google. Play updates reboot then OEM Lock should be get rid of Grey. You need add account to made frp Lock on.
Meanwhile check ur kg state in odin should be checking. Not broken!! If broken wipe phone without any account on it and flash Stock firmware check kg state shoud be checking. Kg state checking means that you can Lock OEM magisked phone. Dont worry u can always fix broken state if u see it
Ah if u see Grey OEM Lock that means u need add Google account and samsung for sure and your OEM Lock is checking So its fine i suppose . If kg state is broken u should not see OEM Lock option am i right XD? Kg state can be broken when u wipe data via recovery while Google account is addedo. So i bet ur kg state is checking now u need only add accounts and try reboot maybe a while too. Sorry i smoke a lot of weed xddd
Conider that you do e everything ok when your Phone is rooted with magisk safety net looks like this, and you Lock your OEM So half baked protection of frp still working. You can do this all with kg state
Click to expand...
Click to collapse
Thanks.
WHat CSC should I pick for call recording ? ILO ? or XID ?

i can add call recorder

Ziomus said:
First of all root phone, download root Explorer then open it change to r/w and go to efs/imei then change these 3 files to ur desired code. Then download latest firmware using frija meanwhile go to dev settings and Lock OEM. Flash downloaded firmware are yep that OXM with CSC file to wipe all data. Voila ur s21+ my dear friend is debranded permamently. After that start using magisk and be happy with ur phone.
My s21+ was TPL/TPL/TPL/EUX/TPL
View attachment 5246233
Last line of CSC cannot change its on mobo but its not a problem i was able to register and download latest UBB patch via ota after clean flash. Still always patch AP with magisk app when new firmware came out then use all files with home_csc in odin. In case of new firmware comes out and u want upgrade already magsked phone.
Click to expand...
Click to collapse
Hi, i don't know if you are still active, but do you know if there is a way to UnRoot after all of that ?
Because i want to keep the warranty etc, so i juste want to change the CSC to unlock my phone from the operator.
Thanks in advance

Shayzer said:
Hi, i don't know if you are still active, but do you know if there is a way to UnRoot after all of that ?
Because i want to keep the warranty etc, so i juste want to change the CSC to unlock my phone from the operator.
Thanks in advance
Click to expand...
Click to collapse
Hi
Once you root there is no way back....
Samkey offer a pay service to change your csc... no need to root but there is the need to pay
Just re read your post.....changing your CSC will not unlock ( carrier lock , sim lock) from the operator....

Question FirstNet Unlocked Guide

Converting your Unlocked device over to FirstNet firmware requires Patched Odin you need the v3.14.1 Patched version. You will also need the newest TMB (universal) carrier firmware, links below. Extract the zip when the download completes. You will not lose any data or factory reset during this process. You will need an ATT sim card.
S22
S22 Plus
S22 Ultra
Take your current S22 running the unlocked U1 firmware (don't skip this step, only U1 firmware can make the change to the ATT - CSC) and insert an ATT sim it has to be ATT not your FN Sim. If you don't have one you can try your local ATT store with a FirstNet rep and explain that you just need an unactivated ATT sim. If they give you any trouble, WalMart sells prepaid ones for $10.
Insert the ATT sim, you will get a pop-up explaining that the phone needs to restart to apply ATT settings. Let it restart. Once your phone is up and running, power it down.
Open Patched Odin and load up all the respective files from the folder you downloaded. Use BL, AP, CP and HOME_CSC (using the other CSC will factory reset and revert to XAA firmware.) now put your phone in download mode (boot up while holding power + vol up + vol down.) Once in download mode connect the phone via USB to your computer. Once Patched Odin recognizes the phone go ahead and flash. Your phone will reboot with an ATT logo. You can now swap back to the FN Sim.
Now you have a FirstNet S22.

For anyone wondering this method currently works on the SM-F936U1 (unlocked Fold 4).

You can activate the ATT CSC by using samfw's frp tool and just changing CSC to ATT.

craznazn said:
You can activate the ATT CSC by using samfw's frp tool and just changing CSC to ATT.
Click to expand...
Click to collapse
I was just thinking if this was possible. I just found out about SanFw's frp Tool. I was thinking of going back to U1 firmware and then use the tool to just change CSC to ATT

kraz01 said:
I was just thinking if this was possible. I just found out about SanFw's frp Tool. I was thinking of going back to U1 firmware and then use the tool to just change CSC to ATT
Click to expand...
Click to collapse
If you do this can you post here if it works or not? I want to go back to firstnet when i return to the us and this would make it easy.
I wonder if just changing the csc will remove the unlocked firmware features like the built in caller id and spam blocker. Anyone know?

craznazn said:
You can activate the ATT CSC by using samfw's frp tool and just changing CSC to ATT.
Click to expand...
Click to collapse
Can you confirm this will allow my factory unlocked S22 Ultra to work on FirstNet?

ErickF said:
If you do this can you post here if it works or not? I want to go back to firstnet when i return to the us and this would make it easy.
I wonder if just changing the csc will remove the unlocked firmware features like the built in caller id and spam blocker. Anyone know?
Click to expand...
Click to collapse
I'm going to try it today. I'll post my results later on.

craznazn said:
You can activate the ATT CSC by using samfw's frp tool and just changing CSC to ATT.
Click to expand...
Click to collapse
I used SamFw Tool to change the CSC but after restart, the phone forces a restart and reverts back to XAA when i put in the FirstNet Sim. Any idea on how to get the CSC to stay?

This is what is is going back too.
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kraz01 said:
I used SamFw Tool to change the CSC but after restart, the phone forces a restart and reverts back to XAA when i put in the FirstNet Sim. Any idea on how to get the CSC to stay?
Click to expand...
Click to collapse
Dont have an answer for you but when you go to SIM card status and are not connected to wifi does it show the IMS registration status as registered? If so it might be working.

kraz01 said:
I used SamFw Tool to change the CSC but after restart, the phone forces a restart and reverts back to XAA when i put in the FirstNet Sim. Any idea on how to get the CSC to stay?
Click to expand...
Click to collapse
In adb:
Code:
pm uninstall -k --user 0 com.samsung.android.cidmanager

brajonrondo said:
Converting your Unlocked device over to FirstNet firmware requires Patched Odin you need the v3.14.1 Patched version. You will also need the newest TMB (universal) carrier firmware, links below. Extract the zip when the download completes. You will not lose any data or factory reset during this process. You will need an ATT sim card.
S22
S22 Plus
S22 Ultra
Take your current S22 running the unlocked U1 firmware (don't skip this step, only U1 firmware can make the change to the ATT - CSC) and insert an ATT sim it has to be ATT not your FN Sim. If you don't have one you can try your local ATT store with a FirstNet rep and explain that you just need an unactivated ATT sim. If they give you any trouble, WalMart sells prepaid ones for $10.
Insert the ATT sim, you will get a pop-up explaining that the phone needs to restart to apply ATT settings. Let it restart. Once your phone is up and running, power it down.
Open Patched Odin and load up all the respective files from the folder you downloaded. Use BL, AP, CP and HOME_CSC (using the other CSC will factory reset and revert to XAA firmware.) now put your phone in download mode (boot up while holding power + vol up + vol down.) Once in download mode connect the phone via USB to your computer. Once Patched Odin recognizes the phone go ahead and flash. Your phone will reboot with an ATT logo. You can now swap back to the FN Sim.
Now you have a FirstNet S22.
Click to expand...
Click to collapse
WILL THIS WORK ON TMOBILE S22 ULTRA?

invalidsim said:
WILL THIS WORK ON TMOBILE S22 ULTRA?
Click to expand...
Click to collapse
Yes flash to U1 first and then use the AT&T sim with the guide above.

brajonrondo said:
Converting your Unlocked device over to FirstNet firmware requires Patched Odin you need the v3.14.1 Patched version. You will also need the newest TMB (universal) carrier firmware, links below. Extract the zip when the download completes. You will not lose any data or factory reset during this process. You will need an ATT sim card.
S22
S22 Plus
S22 Ultra
Take your current S22 running the unlocked U1 firmware (don't skip this step, only U1 firmware can make the change to the ATT - CSC) and insert an ATT sim it has to be ATT not your FN Sim. If you don't have one you can try your local ATT store with a FirstNet rep and explain that you just need an unactivated ATT sim. If they give you any trouble, WalMart sells prepaid ones for $10.
Insert the ATT sim, you will get a pop-up explaining that the phone needs to restart to apply ATT settings. Let it restart. Once your phone is up and running, power it down.
Open Patched Odin and load up all the respective files from the folder you downloaded. Use BL, AP, CP and HOME_CSC (using the other CSC will factory reset and revert to XAA firmware.) now put your phone in download mode (boot up while holding power + vol up + vol down.) Once in download mode connect the phone via USB to your computer. Once Patched Odin recognizes the phone go ahead and flash. Your phone will reboot with an ATT logo. You can now swap back to the FN Sim.
Now you have a FirstNet S22.
Click to expand...
Click to collapse
can confirm this works for firstnet on s23 ultra. SM-S918U1.
Wifi calling, visual voice mail, volte, and real 5g+ all working after home csc update.
Just make sure firstnet account is provisioned for the features, it's free just call them. Don't listen to their support "techs" tell you a u1 phone won't work with features, it will. FYI prior to update u1 is stuck on lte and can't use 5g/5g+ even if it says it's connected.

Question Is there a way to change CSC on my USA model?

Hi! I have an A53. Having waited for any exploit root wise for the USA models, I've started looking at other alternative ways to get there.
I know the biggest hang up is that on USA models the "Unlock OEM Bootloader" option is not present in the Developer Options.
With there being /some/ exploits and things you can do to the device prior to having root access, I was wondering if there is any feasible way to load something like a UK firmware on to my device to then provide me with the "Unlock OEM Bootloader" option-
I attempted changing the CSC with the SamFW tool 4.0, and though it claimed to have changed the CSC to BTE (From XAA) it still did not let me load up a BTE firmware in ODIN.
Is there any way whatsoever to cheat this mess of unrootability?
Please let me know any ideas you have!
Thank you!

cascaraband said:
Hi! I have an A53. Having waited for any exploit root wise for the USA models, I've started looking at other alternative ways to get there.
I know the biggest hang up is that on USA models the "Unlock OEM Bootloader" option is not present in the Developer Options.
With there being /some/ exploits and things you can do to the device prior to having root access, I was wondering if there is any feasible way to load something like a UK firmware on to my device to then provide me with the "Unlock OEM Bootloader" option-
I attempted changing the CSC with the SamFW tool 4.0, and though it claimed to have changed the CSC to BTE (From XAA) it still did not let me load up a BTE firmware in ODIN.
Is there any way whatsoever to cheat this mess of unrootability?
Please let me know any ideas you have!
Thank you!
Click to expand...
Click to collapse
There are no solutions currently
Unless the device model contains an MTK processor

if your device is SM-A536U with SamFW tool 4.0 you can only change your original CSC with one of the OYN multi CSC firmware ( stored in prism or and optic firmware )
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BTE : UK (BT) is part of A536B firmware

yakapa40 said:
if your device is SM-A536U with SamFW tool 4.0 you can only change your original CSC with one of the OYN multi CSC firmware ( stored in prism or and optic firmware )
View attachment 5832469
BTE : UK (BT) is part of A536B firmware
Click to expand...
Click to collapse
How about the SM-S536DL; Straight Talk/Tracfone variant? I've SIM-unlocked it but would like to flash U radio bands. Not getting bands 41 or 71 so no 5G on T-Mobile. There used to be a time where you could enter codes in the dialer to access hidden menus to select radio bands, but long patched I guess.

@mewcatchew​you can try to change your CSC to TFO ( with T mobile préconfiguration )
regards

yakapa40 said:
@mewcatchew​you can try to change your CSC to TFO ( with T mobile préconfiguration )
View attachment 5835083
View attachment 5835097
regards
Click to expand...
Click to collapse
Thank you!
Do I just flash the CSC?
Simple Mobile is owned by Verizon now (acquired all of Tracfone) but hopefully still using T-Mobile.
EDIT: I flashed the CSC only with SamFW Tool 4.0, still says TFN, no 5G. In fact the CSC says TFN in the file, they all do whether I choose CSC "TFA", "TFV', "TFO" etc. Its all Tracfone so...?
Edit # 3: I just ended up flashing all 4 TFO files. Looks like I have 5G now. Who knew.

i don't speak about flashing CSC but only changing CSC with this tool
Galaxy S918B S23 OXM multi CSC S23 OWO multi CSC
extracted from original firmware : multi CSC OXM BTB | UK (BT , BT OnePhone , BTop Roaming) BTE | UK (BT) PKD | PAKISTAN multi CSC OWO GLO | GUATEMALA
forum.xda-developers.com

There's also this new thing you can try to change CSC.
https://www.reddit.com/r/samsung/comments/10zdhv1
Does not require root, and no idea when Samsung will patch it.

PlutoDelic said:
There's also this new thing you can try to change CSC.
https://www.reddit.com/r/samsung/comments/10zdhv1
Does not require root, and no idea when Samsung will patch it.
Click to expand...
Click to collapse
I checked it out earlier; I found options to enable 5G bands 41 & 71, also LTE band 71. But I never seen anything other than LTE bands 2, 4, 12, & 66 actually being used. After reboot, the bands selected weren't selected anymore as far as I can recall. Also, changing the CSC doesn't actually seem to change it. It's an interesting tool, but I don't think it actually does anything except making you think you did. This was with my SIM unlocked Straight Talk A53, using Mint Mobile SIM card (T-Mobile). Maybe I wasn't doing it correctly, but it was fun being able to access these hidden menus I haven't been able to for eons.
What I did do yesterday, was flash TFO firmware with Odin (my A53 is TFN) and even though my CSC still says "TFN" It says 5G on my signal bar now - I never got 5G before that. I have no idea what band, probably just trickery on Mints part. I've only ever seen LTE bands 2, 4, 12, & 66 in use in the service menu.

yakapa40 said:
i don't speak about flashing CSC but only changing CSC with this tool
Galaxy S918B S23 OXM multi CSC S23 OWO multi CSC
extracted from original firmware : multi CSC OXM BTB | UK (BT , BT OnePhone , BTop Roaming) BTE | UK (BT) PKD | PAKISTAN multi CSC OWO GLO | GUATEMALA
forum.xda-developers.com
Click to expand...
Click to collapse
I tried that yesterday, didn't work. See pics below.

but after i can see changing to TFO OK

yakapa40 said:
but after i can see changing to TFO OK
View attachment 5836777
Click to expand...
Click to collapse
look at 2nd picture. TFN, no change.

mewcatchew said:
Thank you!
Do I just flash the CSC?
Simple Mobile is owned by Verizon now (acquired all of Tracfone) but hopefully still using T-Mobile.
EDIT: I flashed the CSC only with SamFW Tool 4.0, still says TFN, no 5G. In fact the CSC says TFN in the file, they all do whether I choose CSC "TFA", "TFV', "TFO" etc. Its all Tracfone so...?
Edit # 3: I just ended up flashing all 4 TFO files. Looks like I have 5G now. Who knew.
View attachment 5835811
Click to expand...
Click to collapse
it's not connected to 5G, if the 5G icon is not in Bold is not connected to 5G, 5G icon not in Bold, only means that your carrier is transmitting a 5G signal that your phone can detect. I have that problem. I have the A536U1/DS, my carrier model is A536E/DS, so I have the 5G icon but not in bold, so I can't connect to my carrier 5G, and apparently the A536U1/DS cannot be converted to A536E/DS.
You can download NetMonster APP and you will see that it's not connected to 5G..