Database Develop

downgrade bootloader ?

hi guys,
I bought SM-N950F. it came with N950FXXS5CRJ1 firmware.
I try installing several different roms but all having issue. LTE don't work while I am on call. speed test shows less than 1 MB speed. wifi calling not there.
is there way to downgrade bootloader ?
thanks

pnjboyzz said:
hi guys,
I bought SM-N950F. it came with N950FXXS5CRJ1 firmware.
I try installing several different roms but all having issue. LTE don't work while I am on call. speed test shows less than 1 MB speed. wifi calling not there.
is there way to downgrade bootloader ?
thanks
Click to expand...
Click to collapse
To my knowledge you can't downgrade the bootloader. What carrier/country? You may just need to update APN settings or something like that. Wifi calling may depend on CSC file too (or require a call to your carrier in some cases)...

USA--> Tmobile.
but why doesn't wifi calling feature does not appear anywhere

pnjboyzz said:
hi guys,
I bought SM-N950F. it came with N950FXXS5CRJ1 firmware.
I try installing several different roms but all having issue. LTE don't work while I am on call. speed test shows less than 1 MB speed. wifi calling not there.
is there way to downgrade bootloader ?
thanks
Click to expand...
Click to collapse
No! Sorry!
You can try another firmware with N950FXX"s5" or "u5"C***
But you can't go back to N950FXX"s/u 4, 3, 2, 1"*****
If your rooted you can just flash a csc zip file containing your cell providers csc. You can find it by searching xda.
But you'll lose Samsung pay, secure folder for good no getting them back without changing motherboard.

thanks
I could not able to understand which csc is for usa

pnjboyzz said:
thanks
I could not able to understand which csc is for usa
Click to expand...
Click to collapse
For USA tmobile is TMB but you will not find that for your phone model SM-N950F. It's only for SM-N950U or U1.
Only way is to root your device and flash the zip file containing the TMB csc .

pnjboyzz said:
thanks
I could not able to understand which csc is for usa
Click to expand...
Click to collapse
You can try csc detonator maybe. As far as i know tmobile doesnt allow phones volte and wifi calling if you dont buy from them yet i dont have many knowlagde on usa models and tmobile but you can take a look at csc detonator or tmobile csc threads

I am experiencing a similar situation, but noticed that the new bootloader after u5 is "S5"? But are both compatible between each other, I don't think they are.

Note 9 SM-N9600 CSC Change to INS (India) for Enabling Jio VoLTE

Hi All,
Can someone please guide me to a method, if any, to change the CSC of an N9600 model CSC which is currently TGY to INS?
This is to make VoLTE work via the phone dialer instead of using the external Jio4GVoice app.
Is this possible? I know my version is the snapdragon and the Indian version is Exynos 960F or 960FD.
I want to know if the CSC file is processor specific? Can 'only CSC' be flashed via ODIN? If yes, where can i find the CSC files with fast download?
Would it trigger Knox and disable Google/Samsung Pay?

Can someone please provide their inputs?

abhishek.hitman said:
Hi All,
Can someone please guide me to a method, if any, to change the CSC of an N9600 model CSC which is currently TGY to INS?
This is to make VoLTE work via the phone dialer instead of using the external Jio4GVoice app.
Is this possible? I know my version is the snapdragon and the Indian version is Exynos 960F or 960FD.
I want to know if the CSC file is processor specific? Can 'only CSC' be flashed via ODIN? If yes, where can i find the CSC files with fast download?
Would it trigger Knox and disable Google/Samsung Pay?
Click to expand...
Click to collapse
I don't think this will work because the .PIT or partition file is in the CSC image. You would likely require the entire firmware image set to get the support files, frameworks for the dialer. It is not only a matter of a new CSC / region code change.

PulpoRojo said:
I don't think this will work because the .PIT or partition file is in the CSC image. You would likely require the entire firmware image set to get the support files, frameworks for the dialer. It is not only a matter of a new CSC / region code change.
Click to expand...
Click to collapse
So, just for further clarity, I don't want to trip knox or lose samsung/google pay options.
These are my original ROM files:
AP_N9600ZHU1ARJ6_CL14505206_QB20159198_REV00_user_low_ship_MULTI_CERT_meta.tar.md5
BL_N9600ZHU1ARJ6_CL14505206_QB20159198_REV00_user_low_ship_MULTI_CERT.tar.md5
CP_N9600ZCU1ARJ6_CP10967940_CL14505206_QB20159196_REV00_user_low_ship_MULTI_CERT.tar.md5
CSC_OMC_TGY_N9600TGY1ARJ6_CL14505206_QB20159198_REV00_user_low_ship_MULTI_CERT.tar.md5
HOME_CSC_OMC_TGY_N9600TGY1ARJ6_CL14505206_QB20159198_REV00_user_low_ship_MULTI_CERT.tar.md5
I want to know if i could flash the following files in odin and still have knox and other stuff intact?
AP_N9600ZHU1ARJ6_CL14505206_QB20159198_REV00_user_low_ship_MULTI_CERT_meta.tar.md5
BL_N9600ZHU1ARJ6_CL14505206_QB20159198_REV00_user_low_ship_MULTI_CERT.tar.md5
CP_N9600ZCU1ARJ6_CP10967940_CL14505206_QB20159196_REV00_user_low_ship_MULTI_CERT.tar.md5
CSC_OMC_OXM_N960FOXM2ARK2_CL14366801_QB20490073_REV00_user_low_ship.tar.md5
HOME_CSC_OMC_OXM_N960FOXM2ARK2_CL14366801_QB20490073_REV00_user_low_ship.tar.md5
If yes, which CSC should i choose in this scenario, Home_CSC or CSC_? I don't mind a factory reset.
The only thing i'm looking for is to have the CSC changed to a multi-CSC which is the OXM version without tripping Knox and Pay features.
Would the PIT file/partition entries be different in N960F and N9600?
I have noticed the .pit file in the extracted CSC files and they have the model numbers written in it when checked with np++.
Also, would this kind of an inconsistency trip knox?

Bump. Can someone please provide me any info.

As far as I know, there isnt a way to use Snapdragon CSC on Exynos without root, so you will be out of luck, also because CSC file is signed with Samsung key, so cannot flash your own without tripping Knox

abhishek.hitman said:
Hi All,
Can someone please guide me to a method, if any, to change the CSC of an N9600 model CSC which is currently TGY to INS?
This is to make VoLTE work via the phone dialer instead of using the external Jio4GVoice app.
Is this possible? I know my version is the snapdragon and the Indian version is Exynos 960F or 960FD.
I want to know if the CSC file is processor specific? Can 'only CSC' be flashed via ODIN? If yes, where can i find the CSC files with fast download?
Would it trigger Knox and disable Google/Samsung Pay?
Click to expand...
Click to collapse
hey, put your jio sim card in sim 1 and format the phone and start it again it will enable JIO VOLTE on your phone.

samkitshah108 said:
hey, put your jio sim card in sim 1 and format the phone and start it again it will enable JIO VOLTE on your phone.
Click to expand...
Click to collapse
Seriously? Have you tried this method? Do you have an n9600 as well?
N9600 does not have the csc for India in the firmware right, how would it work even if I format the phone again?

abhishek.hitman said:
Seriously? Have you tried this method? Do you have an n9600 as well?
N9600 does not have the csc for India in the firmware right, how would it work even if I format the phone again?
Click to expand...
Click to collapse
i also did it my S7 Edge when i was in Israel i installed european version of oreo and csc was not INS. so when i came india and put my jio sim card it does not work bcoz of csc issue. so i put my sim card in the phone and factory reset the device and boom it worked as when u reset the device automatically download and adapts the sim card setting of that country and my VOLTE was enabled. Yes i have N9600 512 GB from HK

samkitshah108 said:
i also did it my S7 Edge when i was in Israel i installed european version of oreo and csc was not INS. so when i came india and put my jio sim card it does not work bcoz of csc issue. so i put my sim card in the phone and factory reset the device and boom it worked as when u reset the device automatically download and adapts the sim card setting of that country and my VOLTE was enabled. Yes i have N9600 512 GB from HK
Click to expand...
Click to collapse
Cool. Awesome! I'll try to do that but I need to back up a lot of stuff from this phone before I do that.
I'll report back after I have something to update.
Anything else that I need tk make sure in the process of doing a factory reset?

abhishek.hitman said:
Cool. Awesome! I'll try to do that but I need to back up a lot of stuff from this phone before I do that.
I'll report back after I have something to update.
Anything else that I need tk make sure in the process of doing a factory reset?
Click to expand...
Click to collapse
i use samsung cloud to take backup of my phone. its so easy, i just click backup on my old phone and on new phone i put my samsung id and click restore, it restore my phone to same to same as my old device including home screen, settings, calls, messages, widgets, folder wise setting, just like a copy of my old phone installs apps and everything. Hope this will help you to same some time.
How i did Factory reset was first i put JIO sim in my phone and then go to setting and click factory reset, then my whole phone was reset and the again i factory reset my phone and everything incl VOLTE was working properly and now after the update u can have both the sim cards on 4G and now it support Dual VOLTE on the phone.

samkitshah108 said:
i use samsung cloud to take backup of my phone. its so easy, i just click backup on my old phone and on new phone i put my samsung id and click restore, it restore my phone to same to same as my old device including home screen, settings, calls, messages, widgets, folder wise setting, just like a copy of my old phone installs apps and everything. Hope this will help you to same some time.
How i did Factory reset was first i put JIO sim in my phone and then go to setting and click factory reset, then my whole phone was reset and the again i factory reset my phone and everything incl VOLTE was working properly and now after the update u can have both the sim cards on 4G and now it support Dual VOLTE on the phone.
Click to expand...
Click to collapse
I just tried the factory reset just as mentioned by you but i still am not able to enable VoLTE in my phone. Are you sure you have an N9600? Can you please tell me which firmware are you currently have? Mine is N9600ZHU1ARJ6.
Still getting the same error "VoLTE is not supported by your current software version. Contact customer services for more details"
Can you please tell me what i am doing wrong?

abhishek.hitman said:
I just tried the factory reset just as mentioned by you but i still am not able to enable VoLTE in my phone. Are you sure you have an N9600? Can you please tell me which firmware are you currently have? Mine is N9600ZHU1ARJ6.
Click to expand...
Click to collapse
My firmware is N9600ZHU1ARJ3 and u put JIO sim card in Sim 1 slot. if it does not come, again factory reset the phone with sim card in the phone.

samkitshah108 said:
My firmware is N9600ZHU1ARJ3 and u put JIO sim card in Sim 1 slot. if it does not come, again factory reset the phone with sim card in the phone.
Click to expand...
Click to collapse
Yes i did that and the sim is in slot 1 only i even removed the other sim from sim 2 slot. I did reset the phone twice like you mentioned in the previous post.
What could i be doing wrong? When you say you're able to enable VoLTE, you're not using the Jio4GVoice app for calling and all right?

abhishek.hitman said:
Yes i did that and the sim is in slot 1 only i even removed the other sim from sim 2 slot. I did reset the phone twice like you mentioned in the previous post.
What could i be doing wrong? When you say you're able to enable VoLTE, you're not using the Jio4GVoice app for calling and all right?
Click to expand...
Click to collapse
i dont know what is the problem in your phone and its not starting. May be you can ask samsung or JIO helpline customer care number and ask them about the issue.

samkitshah108 said:
i dont know what is the problem in your phone and its not starting. May be you can ask samsung or JIO helpline customer care number and ask them about the issue.
Click to expand...
Click to collapse
May i know your baseband version and build number please?

abhishek.hitman said:
May i know your baseband version and build number please?
Click to expand...
Click to collapse
baseband version N9600ZHU1ARJ3
build no. M1AJQ.N9600ZHU1ARJ3

samkitshah108 said:
baseband version N9600ZHU1ARJ3
build no. M1AJQ.N9600ZHU1ARJ3
Click to expand...
Click to collapse
ok this is a screenshot of my firmware version and other details.
Would you be kind enough to send me your phone firmware details using the phone info app?

abhishek.hitman said:
ok this is a screenshot of my firmware version and other details.
Would you be kind enough to send me your phone firmware details using the phone info app?
Click to expand...
Click to collapse
i have the same version and everything.

samkitshah108 said:
i have the same version and everything.
Click to expand...
Click to collapse
No i think you have the ARJ3 and i have the ARL3. i dont know if that makes a difference.
The thing is i'm unable to find a download for your firmware version N9600ZHU1ARJ3.
Can you please provide me a screenshot of the firmware page in Phone Info app from playstore?

[Guide] Change Note 9 CSC Without Root - Easy Guide

I followed a guide by XDA User applepay from this link, but just wanted to try and simplify it because i found it pretty complicated to understand at first.
It would be worth reading that thread before this even if it doesn't make sense. Please also read this complete thread before you attempt it.
I have only followed the guide so i can't answer any questions to help. I am not responsible for any problems you run into. This is just a guide of what I did to get mine to work.
I was successful using my SM-N960F going from CSC XME to TEL.
I cannot confirm that this method will work on other models, but i don't see why not considering the guide was originally for a S9.
Make sure you select your exact model when downloading files and flashing files. Using other model firmware may brick your phone.
Backup your files! I used Smart Switch on windows. This method will wipe your phone in the process.
Use the original usb cable you got in the box and install the Samsung USB drivers if you haven't already.
I have confirmed on my device that OTA updates work fine after this procedure.
Please comment if you think there is a better way or there is an error in this guide.
Download your combination file from here
Download your new CSC firmware from here
Download Samsung Odin 3.13.1 from here
Download RealTerm from here
1. Open Odin.
Click AP and select your combination file.
Put your Note 9 into download mode by turning it off completely, then holding the volume down and bixby buttons while inserting the usb cable. Confirm that you want to enter download mode.
Click start in Odin.
Once this is complete, your phone should boot into the combination firmware and show your model number. Close Odin.
2. Open RealTerm and go to Port tab.
Set Baud to 230400 and Select Port to ssudmdm0000 or very similar name.
Click the change button.
Go to Send tab.
Enter "AT" and click Send ASCII.
If you get a response like
"+USB READY
BOOTING COMPLETED
AT"
or
"AT"
or
"OK"
or
"BOOTING COMPLETED
AT"
Proceed to the next number.
If you didn't get a response click +CR and send again.
If you get a response like "ERROR" proceed to the next number.
Still if you didn't get a response check your phone status and cable status.
If everything is normal proceed to the next number.
If still you didn't get a response it means your phone or cable is not normal status.
3. Enter "AT+PRECONFG=1,0" and click Send ASCII.
You will get this response.
AT+PRECONFIG=1,0+PRECONFG:1,???
OK
-??? is your current CSC.-
4. Enter "AT+PRECONFG=2,???" and click Send ASCII.
Enter ??? you want to change to another CSC.
You will get this response.
AT+PRECONFG=2,???+PRECONFG:2,OK
OK
-??? is your changed CSC.-
5. Enter "AT+PRECONFG=1,0" and click Send ASCII.
You will get this response.
AT+PRECONFIG=1,0+PRECONFG:1,???
OK
-??? is your changed, current CSC.-
6. CSC change is now complete. You can now close RealTerm.
7. Open Odin again.
Turn your phone off and then put it into download mode again by holding the volume down and Bixby buttons, then plugging the usb cable in.
Fill each field (BL, AP, CP and CSC) with their respective files from the firmware which has the new CSC.
Use the CSC file in the CSC field, not HOME_CSC.
Click start. This will now wipe your phone completely.
8. Your phone should boot into android and everything should be complete!
Enjoy using VoLTE, VoWiFi and RCS!

Many thanks! Will give it a go.
Sent from my SM-G955F using Tapatalk

Work on sm-n9600 hong kong variant?
Enviado desde mi SM-N9600 mediante Tapatalk

Thanks. Worked on my n960f/ds

@laneyyy I guess this is for unrooted device right? There are much easier ways of doing it in rooted device

Techvir said:
@laneyyy I guess this is for unrooted device right? There are much easier ways of doing it in rooted device
Click to expand...
Click to collapse
Yeah this is for unrooted devices

Hmm, will this allow my unrooted n960f/ds to flash the TMB CSC and work? Or does this just let you change to another CSC within the multi CSC?

SystematiQ said:
Hmm, will this allow my unrooted n960f/ds to flash the TMB CSC and work? Or does this just let you change to another CSC within the multi CSC?
Click to expand...
Click to collapse
I'm not sure. I hope someone else can answer that

using n960f with n9600 csc
I have read about this procedure but i dont se any info from other providers than us, Im new about this procedure, i hope you can just help me to understand, i have a n960f and i like to have the csc info from a n9600, im from mexico so it will be great to get all my providers features (telcel) but im kind of lost because i have read about usa providers but no more info, thank you.

SystematiQ said:
Hmm, will this allow my unrooted n960f/ds to flash the TMB CSC and work? Or does this just let you change to another CSC within the multi CSC?
Click to expand...
Click to collapse
Odin still won't let you flash firmware files from an other phone model. which is a good thing since csc.md5 contains a pit file that is very much phone model specific....you dont want that. home_csc.md5 dosent but regardless Odin should still throw an error. I wouldint be game to test with the prince Comey edition of Odin that allows you to do this forcefully apply wrong model firmware file. might work... or not

how about future OTAs after ? if I flashed TMO csc will I get all TMO OTAs in future ?

@laneyyy i need to select combinations file Odion in AP right ? I guess I have to downgrade my firmware first Odin don't let me flash I have the last one firmware

arturodfw said:
@laneyyy i need to select combinations file Odion in AP right ? I guess I have to downgrade my firmware first Odin don't let me flash I have the last one firmware
Click to expand...
Click to collapse
My phone was up to date before I used the latest combination file for my model on that site. I didn't get any errors about downgrading.
As far as OTAs, I'm not sure yet, but worst case is you just need to flash new firmwares by Odin. I think it's definitely worth the trade off to get volte, vowifi and RCS if that's the case

laneyyy said:
My phone was up to date before I used the latest combination file for my model on that site. I didn't get any errors about downgrading.
As far as OTAs, I'm not sure yet, but worst case is you just need to flash new firmwares by Odin. I think it's definitely worth the trade off to get volte, vowifi and RCS if that's the case
Click to expand...
Click to collapse
@laneyyy so the combination file it's on AP option in odin right

arturodfw said:
@laneyyy so the combination file it's on AP option in odin right
Click to expand...
Click to collapse
Ooooh yes. I just saw that I accidentally wrote AT in the guide.

laneyyy said:
My phone was up to date before I used the latest combination file for my model on that site. I didn't get any errors about downgrading.
As far as OTAs, I'm not sure yet, but worst case is you just need to flash new firmwares by Odin. I think it's definitely worth the trade off to get volte, vowifi and RCS if that's the case
Click to expand...
Click to collapse
Agreed

someone please confirm that N9600 chinese snapdragon variant can have working Volte after changing CSC to any US version.
Why the Heck Samsung put region lock! if they do same thing on S10 then I must say goodbye to Samsung for ever!!
we cant even buy a mobile in a foreign country! ?

ran816 said:
someone please confirm that N9600 chinese snapdragon variant can have working Volte after changing CSC to any US version.
Why the Heck Samsung put region lock! if they do same thing on S10 then I must say goodbye to Samsung for ever!!
we cant even buy a mobile in a foreign country! ?
Click to expand...
Click to collapse
what odin you use for the N9600 variant does not work for me, none of them give me fail or port close

laneyyy said:
Ooooh yes. I just saw that I accidentally wrote AT in the guide.
Click to expand...
Click to collapse
@laneyyy works on my S9 plus SM-G9650 but the AT+PRECONFG=2,??? the ??? Its the new CSC U want to change lol that's why my phone no change anything the first time sorry but I figured out now thanks

I can confirm it worked to replace the hedious Hong Kong CSC with a Costa Rica CSC, but just as others, I would like to see if I can use a firmware from US, meaning using a SM-N960U variant on a SM-N9600. Can someone please confirm?

S20 FE 5G csc change

I am pretty new to Samsung's and their csc system.
I have an Australian SN-G781B with OPS csc (Australian carrier)
Just wondering if its possible to change csc to XSA (generic Australian region) to ensure I get more timely updates that won't require carrier testing bs.

olegaku said:
I am pretty new to Samsung's and their csc system.
I have an Australian SN-G781B with OPS csc (Australian carrier)
Just wondering if its possible to change csc to XSA (generic Australian region) to ensure I get more timely updates that won't require carrier testing bs.
Click to expand...
Click to collapse
flashing a CSC is super easy. put your phone in DL mode, fire up Odin, load the file and flash the HOME_CSC, not the CSC. HOME_CSC will allow you to flash firmware without factory resetting it. sammobile.com/firmwares to get the FW you need and be sure to use either SamFirm or.... god dangit... i cant ever remember the other programs name. Anyways, SamFirm allows you download the several GB file literally 5x faster and its a 100% trusted .exe. Anyways, get the U1 version of the firmware and flash it, boom... unlocked phone. Might need patched Odin to get around the phones security that usually blocks firmware flashes like these

The question would be if samkey software supports changing of S20 FE 5G's CSC to other regions (e.g. THL for call recording)

If someone finds a CSC setting, flash-able to the US unlocked S20 FE, which enables eSIM and call recording, yet doesn't impact the available 3G/4G/5G bands, please share the info. Thanks.

I just did a successful CSC change on my USA Unlocked S20 FE 5G without wiping the phone, maybe the info can help you. See my new thread: https://forum.xda-developers.com/galaxy-s20-fe/help/successfully-forced-october-update-t4183325
However, you may need to do your own research on the proper CSC to use in your region. I simply wanted to swap my CSC to XAA so I could force an update is all.

Dont bother as I have xsa and have not received any updates yet.

InfX said:
If someone finds a CSC setting, flash-able to the US unlocked S20 FE, which enables eSIM and call recording, yet doesn't impact the available 3G/4G/5G bands, please share the info. Thanks.
Click to expand...
Click to collapse
@InfX
I'm looking to also enable eSIM on my S20 FE. Did you have any luck?

nba30 said:
@InfX
I'm looking to also enable eSIM on my S20 FE. Did you have any luck?
Click to expand...
Click to collapse
I don't have the device (yet?), sill trying to decide if i want to pull the trigger on it, or get Pixel 5 instead. The eSIM is one heck of a convenience feature when traveling, and i'd really want to know if i can get it working BEFORE actually paying for the device. Right now, sadly, i assume a "no" as an answer on that

InfX said:
I don't have the device (yet?), sill trying to decide if i want to pull the trigger on it, or get Pixel 5 instead. The eSIM is one heck of a convenience feature when traveling, and i'd really want to know if i can get it working BEFORE actually paying for the device. Right now, sadly, i assume a "no" as an answer on that
Click to expand...
Click to collapse
Correct, I have the US unlocked version and trying to activate an eSIM from US Mobile for a trip to Asia soon. So far, no luck. For whatever reason, Samsung is disabling this feature in the US for now....

nba30 said:
Correct, I have the US unlocked version and trying to activate an eSIM from US Mobile for a trip to Asia soon. So far, no luck. For whatever reason, Samsung is disabling this feature in the US for now....
Click to expand...
Click to collapse
Google it on the original S20 series, and you'll see the same story. For example, here - US Unlocked Version ESIM Update? - Samsung Community - 1147639. Guess we can spell the "for now" in the quote above as "for good".

Question Change CSC S21 ultra

Hello any solution to change csc on s21 ultra? Samkey not work

it seems there is no way curently

I did this method and it worked https://androidmore.com/change-csc-samsung/
I have a s21 ultra exynos , and a unlock phone , global version
I installed the AUT update via odin and the csc was TPA , so i did the method on the link to change to AUT and it worked but it deleted everything

but what about Carrier blotware?

Jpablo67 said:
I did this method and it worked https://androidmore.com/change-csc-samsung/
I have a s21 ultra exynos , and a unlock phone , global version
I installed the AUT update via odin and the csc was TPA , so i did the method on the link to change to AUT and it worked but it deleted everything
Click to expand...
Click to collapse
Hmmm, it says invalid MMI code whenever I try it.

Jpablo67 said:
I did this method and it worked https://androidmore.com/change-csc-samsung/
I have a s21 ultra exynos , and a unlock phone , global version
I installed the AUT update via odin and the csc was TPA , so i did the method on the link to change to AUT and it worked but it deleted everything
Click to expand...
Click to collapse
Which step on the link did you exactly do? There are many options.

Any update on this? I have S21 Ultra with TPA and I want to change the CSC to BTU. I am in Canada and I hope this will help with faster updates. Also I am having problems with slow 4G uploads, and faster updates might be the solution.
Thank you..

elena11 said:
Any update on this? I have S21 Ultra with TPA and I want to change the CSC to BTU. I am in Canada and I hope this will help with faster updates. Also I am having problems with slow 4G uploads, and faster updates might be the solution.
Thank you..
Click to expand...
Click to collapse
If your device is SD then you won't be able to get BTU.
If it is exynos then you can flash the BTU firmware.
Your 4g speeds may be slow if you do not have the correct csc files for your provider. Eg: having BTU for Rogers may not get your the speeds you are looking for.

Techvir said:
If your device is SD then you won't be able to get BTU.
If it is exynos then you can flash the BTU firmware.
Your 4g speeds may be slow if you do not have the correct csc files for your provider. Eg: having BTU for Rogers may not get your the speeds you are looking for.
Click to expand...
Click to collapse
I have Exynos device. If I do Canadian CSC on Exynos S21 Ultra, will I have better 4G in Canada?
Thank you.

@carlitobahsoun
March Update is out for S21 Ultra xid CSC . So if I want call recording I just have to flash xid home_csc right?

iamnotkurtcobain said:
@carlitobahsoun
March Update is out for S21 Ultra xid CSC . So if I want call recording I just have to flash xid home_csc right?
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yup , i only flashed home csc , no wipe sure , other poeple on Russian forum flashed full 4 files / for me from first open box was downloaded xid full firmware and once get my s21 ultra i flashed only home csc .
i got march patch now ota and will install now
my out of box csc was MID/MID/MID/XSG
now its XID/XID/XID/XSG
and OTA received well
**in case AFTER FLASH AND REBOOT a pop up appear asking u keep curent or back to sim card detected : SELECT KEEP CURENT.

@carlitobahsoun
Is there another way than samkey to change my DBT CSC to ATO? voLTE isn't working with my simcard if I don't have ATO as CSC :/

iamnotkurtcobain said:
@carlitobahsoun
Is there another way than samkey to change my DBT CSC to ATO? voLTE isn't working with my simcard if I don't have ATO as CSC :/
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till now , only samkey .....
i dont have volte in my country , no 5g in my country , no google pay in my country , no samsung pay in my country , no PayPal in my country , no paid app or watchface appears in galaxy store in my country , bad bad bad .

I used the link in this tread and I selected BTU, but I did not pay attention that it was mentioned that is Single. Now I have BTU, but I have some problems receiving SMS and I cannot go back to TPA. When I try *#272* IMEI# it does not do anything. Any idea what I have to do to go back to Dual SIM?

elena11 said:
I have Exynos device. If I do Canadian CSC on Exynos S21 Ultra, will I have better 4G in Canada?
Thank you.
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You will not be able flash Canadian CSC on an exynos device.
First you have to root the device and Either you or some else will have to edit the canadian csc file to make it compatible wtih exynos.
Some one has done for me in the past with note 8 but that dev is no longer in XDA.
The other option is to root and then copy the required csc files.
With this there is a high chance that the imeir related files can get corrupted.

elena11 said:
I used the link in this tread and I selected BTU, but I did not pay attention that it was mentioned that is Single. Now I have BTU, but I have some problems receiving SMS and I cannot go back to TPA. When I try *#272* IMEI# it does not do anything. Any idea what I have to do to go back to Dual SIM?
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Click to collapse
You can flash any other file with multicsc.
There is no reason for you not recieve sms with BTU csc. However, if it does happen fhe csc firmware that is the original one. i.e look at the third tri letter in the csc info.(this third letter never changes , more like hard coded)

I do get SMSs but, I was not able to get one from my bank. The 3rd 3 letters are still TPA. I do not know if it is normal, but the dual sim menu has much fewer options. I can choose from what sim to call only after I dial at least one digit. And When I try to activate Dual sim always on, the toggle still stays off.
For the Canadian CSC, I suspected that it will be impossible to flash. I used to be on TPA and now I am on BTU, I had problems slow upload speed on 4G. Now is a bit better, but the download is staying around 50-75. before I had 160-300 Mbps.
Where I can get Multicsc and do I have to root the phone?
Thank you.

elena11 said:
I do get SMSs but, I was not able to get one from my bank. The 3rd 3 letters are still TPA. I do not know if it is normal, but the dual sim menu has much fewer options. I can choose from what sim to call only after I dial at least one digit. And When I try to activate Dual sim always on, the toggle still stays off.
For the Canadian CSC, I suspected that it will be impossible to flash. I used to be on TPA and now I am on BTU, I had problems slow upload speed on 4G. Now is a bit better, but the download is staying around 50-75. before I had 160-300 Mbps.
Where I can get Multicsc and do I have to root the phone?
Thank you.
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Click to collapse
Rooting won't help you much with signal or speed of data, unless you have to flash some modified csc files.
Your problem could also be the absence of the required bands,whuch may be lacking in exynos.
I have a SD version ( decided to go wtih non root this time as most of the things that need root can be done with adb anyways. Also there is root for SD too these days) so cannot help you much.

Techvir said:
Rooting won't help you much with signal or speed of data, unless you have to flash some modified csc files.
Your problem could also be the absence of the required bands,whuch may be lacking in exynos.
I have a SD version ( decided to go wtih non root this time as most of the things that need root can be done with adb anyways. Also there is root for SD too these days) so cannot help you much.
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I am missing only one band, and this is not a problem. B29 in LTE. Al the rest are there. My question was more like is it normally to loose t some fucntciuts of Dual sim manager and and is there an easy way to change back and forth CSC without rooting. I do not want to root. Thank. you

elena11 said:
I am missing only one band, and this is not a problem. B29 in LTE. Al the rest are there. My question was more like is it normally to loose t some fucntciuts of Dual sim manager and and is there an easy way to change back and forth CSC without rooting. I do not want to root. Thank. you
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Chainging csc is easy by flashing the CSC file. Rooting won't affect it. Rooting has its downsides.
Your loss of dual sim fn could be related to csc but BTU should support full dual sim fn.