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How do I change from Three UK firmware to BTU on Galaxy S8+ without losing data

Can anyone provide a very detail guide on how to change from Three UK firmware to BTU on Galaxy S8+ as Three UK hasn't updated Galaxy S8+ since April. I feel very left out at the moment. I would like to change without losing data. Is there a way of doing this?

kalinskym said:
Can anyone provide a very detail guide on how to change from Three UK firmware to BTU on Galaxy S8+ as Three UK hasn't updated Galaxy S8+ since April. I feel very left out at the moment. I would like to change without losing data. Is there a way of doing this?
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Yeah I hate this too so out of date, but I am seeing three firmware appearing on sammobile everywhere else apart from united kingdom. I was actually thinking of flashing the three firmware at one stage as I'm missing out on volte but having more up to date firmware is top priority for me

I would like to keep WiFi calling. Even though I haven't used it once. Why is Three behaving like this. Did you flash BTU version after being fed up with Three lack of updates.

kalinskym said:
Can anyone provide a very detail guide on how to change from Three UK firmware to BTU on Galaxy S8+ as Three UK hasn't updated Galaxy S8+ since April. I feel very left out at the moment. I would like to change without losing data. Is there a way of doing this?
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Click to collapse
NOT possible...
BTU is part of the Multi-CSC OXM where MANY European CSC's are included.
If you download for i.e. the BTU-firmware, that'll be the same firmware as for i.e. PHN (Netherlands).
You'll have to flash BL CP AP & CSC_OXM on your phone; your phone will be resetted afterwards.
The DEFAULT CSC for OXM is XEU. Your phone "sees", that an UK-SIM is included and will "switch" to the best CSC for your device, which is in this case XEU. You won't get BTU on your device...

I'll lose my data with XEU won't I

kalinskym said:
I'll lose my data with XEU won't I
Click to expand...
Click to collapse
If you change your CSC, you'll ALWAYS lose your data...

Also worth noting that to keep Volte/WiFi Calling you would need to use the Three Firmware (H3G) as the OXM CSC firmware does not enable it.
I'm a Three UK customer and have tried many times to get Volte/WiFi calling working on XEU (OXM Multi CSC) with no luck. Only works when I use H3G firmware but I hate the crappy branding so sacrificed Volte for no branding.

I flashed from vodafone uk to btu but as someone said you get xeu. Updates are fast I had 3 already.
Sent from my SM-G955F using XDA-Developers Legacy app

I flashed the OXM firmware from henklbr's thread, but used HOME_CSC from the last H3G firmware to keep WiFi callling
Sent from my Pixel using Tapatalk

I'm on 3 had update this morning,

Latest update was pushed this morning on 3UK

Good one

flashed three firmware coming from xeu but cant send text messages lol everything else works, also the message center is grayed out so i cant manually imput the smsc number....

Just need to wait until we get August update. Probably won't be till November/ December. I hope when Beta for Android O is released. We will be able to join in on the excitement

Any way to get VoLTE working with international phone?

Hello
I bought an s8+ from HK which is the dual SIM Snapdragon version (G9550). Using it here in Australia, everything works as expected as it supports all of our bands, however VoLTE does not work. I've read this is because the CSC does not match a local CSC.
Unfortunately there are no Snapdragon versions sold here, hence no firmware with the Aus CSC (XSA) that will support VoLTE (as I read you can't flash the Exynos ROM onto the Snapdragon).
Is there any way I can enable VoLTE? Can I somehow change the CSC without an official ROM? Like go into the G9550 ROM and replace the CSC with the Aus CSC?
The only other region with the Snapdragon is the US from what I can tell, which probably wouldn't enable VoLTE either.
Any advice is appreciated
Thanks.

ult_nrg said:
Hello
I bought an s8+ from HK which is the dual SIM Snapdragon version (G9550). Using it here in Australia
Is there any way I can enable VoLTE? Can I somehow change the CSC without an official ROM? Like go into the G9550 ROM and replace the CSC with the Aus CSC?
The only other region with the Snapdragon is the US from what I can tell, which probably wouldn't enable VoLTE either.
Any advice is appreciated
Thanks.
Click to expand...
Click to collapse
You may root and then flash your csc zip (or simply replace the CSC files in the custom rom with your CSC files). You should get VoLTE. Download Multi CSC file from here and extract your csc.
I do the same but with India CSC on USA snapdragon models.

nimms said:
You may root and then flash your csc zip (or simply replace the CSC files in the custom rom with your CSC files). You should get VoLTE. Download Multi CSC file from here and extract your csc.
I do the same but with India CSC on USA snapdragon models.
Click to expand...
Click to collapse
Thanks nimms. This is pretty much exactly what I was after, except I cannot root the phone (work required Knox so I can't trip it ). I was hoping I could do somthing like the above, only via Odin, but it sounds like you can't change the CSC without rooting the phone due to making system changes.

Try this code in dialer *#272*imei# and change your csc from there

thatsupnow said:
Try this code in dialer *#272*imei# and change your csc from there
Click to expand...
Click to collapse
Thanks for the reply!
I've tried that but unfortunately get a dialog saying "UNKNOWN APPLICATION".

ult_nrg said:
Hello
I bought an s8+ from HK which is the dual SIM Snapdragon version (G9550). Using it here in Australia, everything works as expected as it supports all of our bands, however VoLTE does not work. I've read this is because the CSC does not match a local CSC.
Unfortunately there are no Snapdragon versions sold here, hence no firmware with the Aus CSC (XSA) that will support VoLTE (as I read you can't flash the Exynos ROM onto the Snapdragon).
Is there any way I can enable VoLTE? Can I somehow change the CSC without an official ROM? Like go into the G9550 ROM and replace the CSC with the Aus CSC?
The only other region with the Snapdragon is the US from what I can tell, which probably wouldn't enable VoLTE either.
Any advice is appreciated
Thanks.
Click to expand...
Click to collapse
Hi
As far as I'm concerned, this is not possible without tripping the Knox counter. And if you try flashing the XSA CSC (via Odin), you will definitely soft brick your phone

ims setting. maybe can fix your issue ,just download a hidden app display. then you can open ins setting

t-shock said:
Hi
As far as I'm concerned, this is not possible without tripping the Knox counter. And if you try flashing the XSA CSC (via Odin), you will definitely soft brick your phone
Click to expand...
Click to collapse
Odin won't even flash it, It's pretty hard to soft brick this phone with official tools and firmware.

Interceptor777 said:
Odin won't even flash it, It's pretty hard to soft brick this phone with official tools and firmware.
Click to expand...
Click to collapse
Yes
Odin won't flash it but if you try to flash it and after that you reboot, you will stuck at download mode. Only by flashing the correct files, will make it boot

t-shock said:
Yes
Odin won't flash it but if you try to flash it and after that you reboot, you will stuck at download mode. Only by flashing the correct files, will make it boot
Click to expand...
Click to collapse
Interesting.
Another question...the only difference I've noticed between the 9550 (HK) and 955U (US) is that the US version does not have Band 28 but the HK version does, which we do use here in Aus.
If I flashed a US firmware (which has the same S835 SoC), would I lose Band28, or would the modem still be able to use it?
EDIT: what if I only flashed the CP file (modem), is this interchangeable between the different SoCs? Could I flash the XSA CP (modem) onto another ROM, or will this soft-brick?
wangksn said:
ims setting. maybe can fix your issue ,just download a hidden app display. then you can open ins setting
Click to expand...
Click to collapse
My IMS is saying "Not registered" in the about phone. I can't seem to do anything about it, and the hidden menu doesn't give me the option to change it.

IMS setting is located explicitly on "Settings -> Mobile Networks -> Access Point Names"
The best bet you may try is to find a Samsung phone thats currently in VoLTE then copy IMS apn settings onto you phone (you manually input the settings).

ult_nrg said:
Interesting.
Another question...the only difference I've noticed between the 9550 (HK) and 955U (US) is that the US version does not have Band 28 but the HK version does, which we do use here in Aus.
If I flashed a US firmware (which has the same S835 SoC), would I lose Band28, or would the modem still be able to use it?
EDIT: what if I only flashed the CP file (modem), is this interchangeable between the different SoCs? Could I flash the XSA CP (modem) onto another ROM, or will this soft-brick?
My IMS is saying "Not registered" in the about phone. I can't seem to do anything about it, and the hidden menu doesn't give me the option to change it.
Click to expand...
Click to collapse
it is can change if you know the parameter. I see have a lots of valume, I don't know why I can't upload the snapshot to hare

Hey , its too easy to get CSC to another Provider. Just ADB Sideload it. I can give you the mod for Germany VD2 or Verizon USA. No Tripping and knox 0x0

012345678 said:
Hey , its too easy to get CSC to another Provider. Just ADB Sideload it. I can give you the mod for Germany VD2 or Verizon USA. No Tripping and knox 0x0
Click to expand...
Click to collapse
Please, write detailed instructions for G9550 and example .zip

012345678 said:
Hey , its too easy to get CSC to another Provider. Just ADB Sideload it. I can give you the mod for Germany VD2 or Verizon USA. No Tripping and knox 0x0
Click to expand...
Click to collapse
+1

Dr. said:
[No_WaY;76004070]+1
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Click to collapse
I need the mod please for changing csc

012345678 said:
Hey , its too easy to get CSC to another Provider. Just ADB Sideload it. I can give you the mod for Germany VD2 or Verizon USA. No Tripping and knox 0x0
Click to expand...
Click to collapse
Do not enter people astray, ADB Sideload It's not working - error "signature verification failed"
need ROOT
VD2-CSC-S8S8p
MY Galaxy S8+ SM-G9550, SW - G9550ZHU2AQL2

Just download an official ROM (A variant from a country that supports VoLTE) for ur model from sammobile or u might even find it on the xda forum and flash it via odin with Home CSC.
It works well... No need to root n KNOX counter wont be tripped...
PS: Backup data.. They will be lost in the process.

Now we're talking about ADB, not ODIN or TWRP.
Flash via ADB Sideload - not possible. You understand me. Smartphones snapdragon not flash Exynos SW. You can only edit an existing profile CSC or add new CSC.
Example:
my smartphone TGY (snapdragon model SW)
but I live in the region of SER (EXYNOS MODEL SW)

GRIBL said:
Now we're talking about ADB, not ODIN or TWRP.
Flash via ADB Sideload - not possible. You understand me. Smartphones snapdragon not flash Exynos SW. You can only edit an existing profile CSC or add new CSC.
Example:
my smartphone TGY (snapdragon model SW)
but I live in the region of SER (EXYNOS MODEL SW)
Click to expand...
Click to collapse
Right, My bad... I missed the international part itself...
But as far as i know, Exynos CSCs also dont go with the Snapdragon CSCs... I could be wrong.

Convert SM-G930S into 930F

I saw a video of a guy who converted his "Galaxy S7: SM-G930V (Verizon) full converted into SM-G930F"
He provides detail as:
"* Based on Official Firmware: G930FXXU1BPJG (UAE)
* The latest baseband: G930FOJV1BPJK1
* Fixed all code: *#06# - *#0*# - *#0808#
* Multi-Languages: Supported 94 Languages
I'd like to convert my G930S to the 930F version as well, if it is actually feasible.
I'm putting together a recipe as follows:
G930FXXU1DQJ3 UK version 7.0 XEU version (Exynos), as I understand it is a generic, unbranded OS
I'm currently on rooted G930S stock 7.0, TWRP back up, and though everything seems just fine, I noted on rooting with ODIN I had to go through a Korean language setup afterwards, until I came to the language page, and then later putting in an english keyboard. I'd like to get rid of the Samsung apps and the T-(Mobile?) korean apps/Samsung bloat.
Order to flash:
1. Flash baseband G930AUCS4BQH1, 7.0 version US, clearing system, cache and data first?
2. Flash ROM
2. Flash CSC, I have AT&T service/derivative, I though I'd flash: CSC XAA, USA unbranded or
USC, USA unbranded
reboot into recovery and
3. flash SuperSU?
4. Reboot to system
I think I have that order correct. Any folks willing to add their insights will be appreciated.
Thank you.

The G930V is a completely different SoC, no way he made it anything other than a 930V that has faked the system information.

Beanvee7 said:
The G930V is a completely different SoC, no way he made it anything other than a 930V that has faked the system information.
Click to expand...
Click to collapse
I put on an Exynos 8+ ROM on my G930S. The phone model now 'shows' it as a G955F, baseband remained unchanged, and the CSC, once Korean or Chinese, now shows conflicting info, from code input into phone, OXM, from System app reader, XAA. But the data region is still in the China area for data services. It remains a 930S at heart, unless I can change the baseband and CSC.
Interestingly, here on the US west coast my AT7T service is working just fine.
I'd like to figure out how to get the baseband and CSC aligned safely and correctly to the US (TMB CSC?).

JeffDC said:
I put on an Exynos 8+ ROM on my G930S. The phone model now 'shows' it as a G955F, baseband remained unchanged, and the CSC, once Korean or Chinese, now shows conflicting info, from code input into phone, OXM, from System app reader, XAA. But the data region is still in the China area for data services. It remains a 930S at heart, unless I can change the baseband and CSC.
Interestingly, here on the US west coast my AT7T service is working just fine.
I'd like to figure out how to get the baseband and CSC aligned safely and correctly to the US (TMB CSC?).
Click to expand...
Click to collapse
You can try following to change csc and baseband:
1. When flashing firmware on odin, select re-partition.
2. Wipe data and cache.
Let me know if everything works fine.
Good luck. Your knox is still under warranty right?

dhkkim said:
You can try following to change csc and baseband:
1. When flashing firmware on odin, select re-partition.
2. Wipe data and cache.
Let me know if everything works fine.
Good luck. Your knox is still under warranty right?
Click to expand...
Click to collapse
I have Samsung s7 SM-G930S and I want to install custom rom of SM-G930FD that should support dual sim as well kindly help me what can I do ? when I try to flash my mobile with smg930fd it fails flashing.

JeffDC said:
I put on an Exynos 8+ ROM on my G930S. The phone model now 'shows' it as a G955F, baseband remained unchanged, and the CSC, once Korean or Chinese, now shows conflicting info, from code input into phone, OXM, from System app reader, XAA. But the data region is still in the China area for data services. It remains a 930S at heart, unless I can change the baseband and CSC.
Interestingly, here on the US west coast my AT7T service is working just fine.
I'd like to figure out how to get the baseband and CSC aligned safely and correctly to the US (TMB CSC?).
Click to expand...
Click to collapse
How did you flash smg930s with smg930f file :/ I have been trying to do this but remain unsuccessful through odin please help as my phone was converted into smg930fd and supported dual sim.

Galaxy S7 UPDATE
Hi,
i got a Korean S7 mobile that was converted to "930F" with 7.0 Nought Firmware.how can i update it to the latest firmware 8.0 bcoz its not updating through its internal update option (setting>about>software info>update manually).
plz help me to update my Galaxy S7 to Latest Update Firmware 8.0 Oreo, WAITING for your answer...
Many thanks.

How to enable VoLTE on SM-G930F?

I was wondering if it's possible to enable VoLTE on an SM-G930F running BTU firmware on an AT&T carrier. Is there any way to get things like WiFi Calling and VoLTE on it, or am I just screwed since I'm using the international variant of the phone?
When I first got it brand new from Wal-Mart, it was running TTT firmware (from Trinidad and Tobago for some reason) and showed normal 3G, 4G, and LTE symbols on my status bar. Since I wanted to get the Nougat update early, I flashed BTU which switched the symbols to H, H+, and 4G. Does that have anything to do with it?
Thanks.

You're certain it's a G930F? And from Walmart of all places? Exynos isn't meant to be sold in the US.
If it's a G930F and you have TWRP you can flash the CSC tool in the development section which has the US carriers, and CSC is what enables VoLTE.
If it's a US snapdragon model you could flash the AT&T CSC via Odin without needing TWRP.

Beanvee7 said:
You're certain it's a G930F? And from Walmart of all places? Exynos isn't meant to be sold in the US.
If it's a G930F and you have TWRP you can flash the CSC tool in the development section which has the US carriers, and CSC is what enables VoLTE.
If it's a US snapdragon model you could flash the AT&T CSC via Odin without needing TWRP.
Click to expand...
Click to collapse
If OP successfully flashed BTU then it has to be a Exynos G930F, but I agree, most phones sold in the US claiming to be the G930F are modded Snapdragons faked to look like it, but they obviously won't allow a Exynos ROM to be flashed to them, so in this case OP has got a real Exynos
Could be the modem (CP) part of the firmware controlling which carrier services you can receive in your region, not sure I'd recommend flashing a US modem to a UK firmware though, unsure what would happen, although the G930F is pretty straight forward to unbrick as long as you can get back into download mode

Beanvee7 said:
If it's a G930F and you have TWRP you can flash the CSC tool in the development section which has the US carriers, and CSC is what enables VoLTE.
Click to expand...
Click to collapse
Where is this CSC tool? I'm not sure what you mean by "development section". I have an Oreo G930F and I'm trying to get VoLTE to work with AT&T.

Feenix0 said:
Where is this CSC tool? I'm not sure what you mean by "development section". I have an Oreo G930F and I'm trying to get VoLTE to work with AT&T.
Click to expand...
Click to collapse
It hasn't been updated with the newer versions of Android so it's not really a thing anymore.
Next best thing is to download the entire firmware package for your carrier from somewhere like updato then flash only the home_CSC file. Although iirc this might now work if mixing and matching models, which is why the CSC flash tool was a thing.

Beanvee7 said:
It hasn't been updated with the newer versions of Android so it's not really a thing anymore.
Next best thing is to download the entire firmware package for your carrier from somewhere like updato then flash only the home_CSC file. Although iirc this might now work if mixing and matching models, which is why the CSC flash tool was a thing.
Click to expand...
Click to collapse
The trouble is that the G930F was never officially released on US markets, so I can't find a US firmware. I'd gladly use another market's firmware if I knew it would support AT&T VoLTE and "LTE only" mode, but I have no idea how to figure that out!

So it turns out that I have the Canadian SM-G930W8 (as shown on the download mode screen), not the G930F (as shown everywhere else). Identical hardware, but I can only flash Canadian firmware.

Question Change region from Korea to Global (or Nordic) on S21+

Hello people, I hope you're okay!
I bought an used S21+ but it was not clear that the model I would receive is Korean (G996N). While I don't have any issues, it also misses the eSIM option (and probably Samsung Pay is not going to work in Europe). The eSIM option would be really good to have (SPay I do not care a lot).
I've been searching for an answer in regards to change the region and the responses are mixed and I am out of Samsung phones and firmware loop for a few years. Some say I can just change the CSC region using SamFW and that's good to go. Some say it will not work because my KOO CSC does not allow this change. Also, OTA firmwares are lost until I switch the CSC back (but, from what I understood, if I also change the firmware it would receive OTA normally).
Question: is it possible, nowadays, to just change Firmware and CSC to another region? My phone has an Exynos processor so it would have to be a firmware from Europe or Latin America.
I also understood it will not brick nor trip knox efuse, right?
Thanks a lot!

@angourakis Ok let me give you a clear response about CSCs. ALL Samsung firmware will let you flash a new CSC (as long as you use Odin). This has worked for me every single time.
You need to update your Android to the latest 13 and download and extract this (remember to use “direct download”, this website is the only one with a good selection of firmware) and use Odin (get 3.14.1 non patched) to flash the HOMECSC file (in the CSC slot).

Hey @traman124 thanks for the response!
Why this firmware in specific? I am running a more recent firmware than the one you mentioned. Also, do I need to have the bootloader unlocked?
Thanks!

It doesn’t need to be that version @angourakis it can be any version… that one will work though And you can use Odin with a locked bootloader (with download mode).

@traman124 thanks again!
Unfortunately, I tripped knox while trying to install a CSC from G996B version (kept BL, AP and CP from G996N and only used CSC from B version).
Now I am trying to look for a trade in program to replace the phone.
Thanks anyway, I really appreciate your help!

@angourakis I’m sorry….. this has never happened to me while flashing CSCs but the few times I have I did it with the same variant phone/tablet…..