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Can't change Australian Note 8 CSC - Stuck on Telstra

Hi Guys,
I purchased a Note 8 (950F) through Gumtree and although I knew it had the Telstra firmware,
I figured I'll just flash the regular Australian XSA unbranded firmware via Odin
and get rid of the Telstra branding as I have done in the past with other Samsungs.
Currently I use an Optus sim (which works) but have lost VoLTE and WiFi calling.
I have tried searching through these forums for a solution but can't get a clear answer.
When I flash the unbranded XSA firmware (BL, AP, CP and CSC, NOT Home_CSC)
I still get the Telstra branding and the software info remains on TEL/TEL/TEL.
Is this normal now? Are we forced to buy a phone from a network carrier if we want to use their services?
Or is there a way to make the switch but I am just overlooking something.
I don't want to root the phone or install anything custom as this will break some banking apps that I'm using.
Please help...

Currently I'm on XEF/XEF/VAU because just upgraded to Oreo, the original CSC is VAU/VAU/VAU
0. Backup your data
1. Download New Zealand or other country firmware.
2. Take both SIM and SD card out.
3. Flash the firmware of other country using CSC, not home_csc
4. Then check your CSC, should be changed.
I did't test the following steps, but I will try this weekend.
5. Flash back to Australia firmware.
6. Check the CSC number, should be changed to XSA
7. Insert SIM card.

hinnn said:
Currently I'm on XEF/XEF/VAU because just upgraded to Oreo, the original CSC is VAU/VAU/VAU
0. Backup your data
1. Download New Zealand or other country firmware.
2. Take both SIM and SD card out.
3. Flash the firmware of other country using CSC, not home_csc
4. Then check your CSC, should be changed.
I did't test the following steps, but I will try this weekend.
5. Flash back to Australia firmware.
6. Check the CSC number, should be changed to XSA
7. Insert SIM card.
Click to expand...
Click to collapse
Thanks for your input, I was considering this as I want Oreo as well but not game enough to try and mix other countries CSC's yet.
I read somewhere that Oreo will be widely available for most countries as of 1st of April, so I might wait till then and try again.

This does NOT necessarily mean Oz...
Remember, we are at the end of the list to get it as our stupid legal system upheld some patents on icons that Apple took out...
Also, if you're with any of the Telco's, add at least 6 months to that date...

Did you ever manage to get this sorted out? I'm in a similar boat to you, I have an Optus device but a Telstra Sim, when using the Telstra sim, I have no option for VoLTE, but when I use my Optus sim I do. Would like to get VoLTE and other features working on my Telstra sim.

SM-G977B - Flash to BTU not working but ODIN Passes

Hey all
Strange one here, i have a SM-G977B (S10 5G on EE UK), i have unlocked it and trying to flash BTU firmware on it via ODIN (download fw from sammobile)
It flashes ok and passes but when phone starts up its CSC is TEL! (Australia!!)
I have re done the flash with XEU and still the same. firmware version says TEL/TEL/EVR in settings
any ideas on this? can this model be flashed to a different region? i want it on BTU not EVR (EE UK)
tried few versions of ODIn too, and left all check boxes default
Thanks

ok, i have reflashed the latest EVR firmware back to the phone and it has taken this fine
Wonder why it doesnt like BTU or XEU?

What firmware files were you trying to flash specifically?
Sounds like you downloaded the wrong one. What are the names of the firmware files you flashed?

the_scotsman said:
What firmware files were you trying to flash specifically?
Sounds like you downloaded the wrong one. What are the names of the firmware files you flashed?
Click to expand...
Click to collapse
Hi
Tried these
https://www.sammobile.com/samsung/firmware/SM-G977B/BTU/download/G977BXXS2ASJ7/299842/
https://www.sammobile.com/samsung/firmware/SM-G977B/XEU/download/G977BXXS2ASJ7/299840/
The above all flash on in Odin, but when the phone starts (even with uk sim in the phone) it defaults to Australia language and 2x Telstra apps install automatically, software info says tel/tel/evr
I then tried this one:
https://www.sammobile.com/samsung/firmware/SM-G977B/VOD/download/G977BXXU2ASJ5/299590/
And the above install the 2x Vodafone uk apps automatically which is fine as I am on Vodafone uk but in software Info is still says vod/vod/evr
What my issue is now is I don’t seem to get 5g on this phone even though I’m on a a 5g contract and has worked previously on a note10+ 5g handset.
Is this handset 5g modem locked to ee?

bigup7 said:
Hey all
Strange one here, i have a SM-G977B (S10 5G on EE UK), i have unlocked it and trying to flash BTU firmware on it via ODIN (download fw from sammobile)
It flashes ok and passes but when phone starts up its CSC is TEL! (Australia!!)
Click to expand...
Click to collapse
Did you enable OEM unlock in developer options before flashing?
I am waiting for delivery of an EE branded S10 5G tomorrow and planned to flash BTU firmware

dezborders said:
Did you enable OEM unlock in developer options before flashing?
I am waiting for delivery of an EE branded S10 5G tomorrow and planned to flash BTU firmware
Click to expand...
Click to collapse
Didn't think I needed to.
Gave up and went back to evr firmware.
Lmk how you get on please

bigup7 said:
Didn't think I needed to.
Gave up and went back to evr firmware.
Lmk how you get on please
Click to expand...
Click to collapse
OK, well I have always had to do that to change CSC via FW flash since the S9 range was released in 2018.
I am waiting for postman to deliver my S10 5G today so will try to flash BTU with OEM Unlock enabled, and let you know the outcome.
(If it doesn't work for me, i will do same as you and flash a network specific FW via Odin - H3G is my network provider).

bigup7 said:
Didn't think I needed to.
Gave up and went back to evr firmware.
Lmk how you get on please
Click to expand...
Click to collapse
Didn't work ended up with TEL CSC code so just flashed latest H3G

dezborders said:
Didn't work ended up with TEL CSC code so just flashed latest H3G
Click to expand...
Click to collapse
If you go to software information in settings, does it say h3g/h3g/evr?

bigup7 said:
If you go to software information in settings, does it say h3g/h3g/evr?
Click to expand...
Click to collapse
Yes exactly. My product code is also SM-G977BZAAEVR, so its always going to be an EE UK handset

Hello,
I have the same phone (SM-G977B), I exchanged it with someone in Shanghai (without a box, stupid me)
It was rooted with some CHC firmware (which did not let me download any Google play services), I tried to root the phone (my first time) and ended up re-locking the bootloader.
Later on, while trying different things, I ended up deleting the firmware from TWRP (as I formatted the data, cache folders/directories) as it was not booting up (bootloop on Samsung logo).
Long story short (and rather sad and stupid):
I have a brick phone which has no SD card slot, No OS installed, I do not know the original CSC (except that it was bought in some country in Europe), other firmwares does not flash with Odin (gives me Repartition error failed error), I am unable to mount the device (thought I could transfer the firmware using MTP), I can not change TWRP (downgrade or upgrade) as disk won't mount (for some reasons). I have formatted the disk, changes its format to ext4, ext2 etc.
Any ideas?

install Verizon "Advanced Calling" on G973U1 firmware?

Verizon is my carrier and I am upgrading to an S10 from an S7. I bought a new S10 loaded with the first Verizon version of Android 10, G973USQS2CSL1. I want to get rid of the bloatware and go back to Android 9. My plan is to flash the U1 firmware, G973U1UES2BSIV, using all 4 of the U1 files. Then flash the Verizon CSC file from this firmware, G973USQS2BSIV, so I can get the "Advanced Calling" for Verizon. I was going to try to do that on my S7 but never got around to it. Here's a thread I created on the S7 forum that said that's what I would need to do to run the unbranded firmware on the S7 but also have Verizon's Advanced Calling (wifi calling, video call, hd calling). https://forum.xda-developers.com/galaxy-s7/help/install-verizon-advanced-calling-g930u-t3997525
I noticed the S10 Verizon firmware now has a 5th file, a USERDATA file. Will I need to also flash that?
I wanted to point out, my new phone is currently locked, but Verizon automatically unlocks it after 60 days. https://www.verizon.com/about/consumer-safety/device-unlocking-policy Will it be a problem if I flash the unbranded firmware on a phone that is still locked? Since Verizon is my carrier, I will obviously be using a Verizon SIM card.
Thank for the help.

You can flash any firmware to your phone as long as it's for the U or U1 models as the "U" means Universal. Bought a phone from AT&T? Flash the Sprint or T-mobile firmware without issues. Same for Verizon and other U.S. carriers firmware.
Flashing the unbranded firmware will get rid of the bloatware, but will also get rid of other features like wifi calling, advanced calling, etc. The user data file is just all of Verizon's bloatware and info crap.
As for going back to Android 9, you can do that as long as you're still on the v2 bootloader. If you've upgraded to the v3 bootloader via OTA, you won't be able to return to Android 9.

StoneyJSG said:
You can flash any firmware to your phone as long as it's for the U or U1 models as the "U" means Universal. Bought a phone from AT&T? Flash the Sprint or T-mobile firmware without issues. Same for Verizon and other U.S. carriers firmware.
Flashing the unbranded firmware will get rid of the bloatware, but will also get rid of other features like wifi calling, advanced calling, etc. The user data file is just all of Verizon's bloatware and info crap.
As for going back to Android 9, you can do that as long as you're still on the v2 bootloader. If you've upgraded to the v3 bootloader via OTA, you won't be able to return to Android 9.
Click to expand...
Click to collapse
I'm on v2 bootloader. Have you heard of flashing the VZW CSC file on top of the U1 unbranded firmware? Apparently people have done it on older devices, like the S7, that only took the 4 files when flashing. I'm trying to run unbranded firmware but still have the Verizon Advanced Calling (wifi calling, HD calling, video call).

Okay if you're on bootloader v2 then you can go back to Android 9. I haven't heard of flashing the carrier CSC file with the unbranded U1 firmware. It might work or might also brick your phone.

Question Changing service provider software version

How can this be done? I'd like the stock UK one (BTU service provider I believe?) as currently it's showing as VOD/VOD EUX etc.
Will my data be wiped? Is it really worth changing and going through the hassle? I've always had stock firmwares either out the box or flashed on Odin by myself but this time it didn't remove the carrier stuff.
I did initially flash the latest stock BTU firmware (all 4 files including CSC not home CSC), yet was still met with the carrier apps and the service provider info says VOD, I'm on Three the phone is unlocked but from Vodafone

uk786 said:
How can this be done? I'd like the stock UK one (BTU service provider I believe?) as currently it's showing as VOD/VOD EUX etc.
Will my data be wiped? Is it really worth changing and going through the hassle? I've always had stock firmwares either out the box or flashed on Odin by myself but this time it didn't remove the carrier stuff.
I did initially flash the latest stock BTU firmware (all 4 files including CSC not home CSC), yet was still met with the carrier apps and the service provider info says VOD, I'm on Three the phone is unlocked but from Vodafone
Click to expand...
Click to collapse
csc detect from SIM CARD .

Question Carrier csc wont change after flashing U1 firmware

I have a verizon branded s21 ultra. Switched to tmobile and flashed the u1 firmware. Flash went fine, rebooted, put in tmobile sim, but still shows VZW/VZW/VZW. Cannot receive tmobile ota's. Model number says U1. Any help is appreciated.
It should show TMB/TMB/VZW correct?

I remember going through a similar issue on A20. The steps are probably the same https://www.droidwin.com/change-csc-codes-samsung/
Even if you can't change the CSC, you can always flash the Tmobile rom (zip) using SamFirm and install them manually https://www.xda-developers.com/download-samsung-updates-free-tools/

Tried flashing tmobile software using Odin. Booted up to verizon splash screen and still showing VZW/VZW/ VZW

Mindripper72 said:
Tried flashing tmobile software using Odin. Booted up to verizon splash screen and still showing VZW/VZW/ VZW
Click to expand...
Click to collapse
SM-G998U1 isn't the model number for the TMobile Branded device, it's the Unlocked variant. You can download the TMobile firmware here. You may not receive TMobile's OTA's even after you flash TMO Firmware since your Primary CSC will always be VZW.
Download Samsung Galaxy S21 Ultra SM-G998U TMB USA (T-Mobile) firmware
All Samsung firmwares for Galaxy S21 Ultra in USA (T-Mobile) with model code SM-G998U. We offer free and fast download options. Check them out now.
www.sammobile.com

When I flashed the TMB firmware, it still boots to Verizon splash screen and still shows VZW/VZW/VZW even though there is a tmobile sim installed

Try changing the CSC to TMO by entering the following code on the Dialer TouchPad. *#272*YOURIMEINUMBER# In the string replace YOURIMEINUMBER with your actual IMEI Number. You may see a list of regional CSC's. Select TMO then select install. I'm not sure this method still works on the Verizon device or after the latest updates but it's worth a try.