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SM-G9880 BRI (taiwan) vs TGY (HK) differences? Thinking about changing CSC

I have a SM-G9880 BRI (taiwan) version and using in Australia. I have all the 3G/4G options but I'm unable to select any 5G - even though the phone is a 5G phone. I know my carrier does not use 5G in my area at this time, so is it not showing any 5G options because 5G is unsupported? Is it SIM related or would it be because I have a BRI (taiwan) CSC? I know others in Australia with SM-G9880 TGY versions using 5G (on different carrier) and they have 5G options... Just confused whether the 5G options are disabled because of the SIM, or because of the CSC???
If its CSC related, I might try Samkey to change the CSC to TGY...

cheetah2k said:
I have a SM-G9880 BRI (taiwan) version and using in Australia. I have all the 3G/4G options but I'm unable to select any 5G - even though the phone is a 5G phone. I know my carrier does not use 5G in my area at this time, so is it not showing any 5G options because 5G is unsupported? Is it SIM related or would it be because I have a BRI (taiwan) CSC? I know others in Australia with SM-G9880 TGY versions using 5G (on different carrier) and they have 5G options... Just confused whether the 5G options are disabled because of the SIM, or because of the CSC???
If its CSC related, I might try Samkey to change the CSC to TGY...
Click to expand...
Click to collapse
5G has not been activated on BRI csc as there is no 5G in Taiwan yet. Its best changing to TGY however you will only get 5G using sim tray 2 (meaning you will not be able to use SD card at the moment).

Is there a fool proof method using Samkey?? Any help is appreciated

cheetah2k said:
Is there a fool proof method using Samkey?? Any help is appreciated
Click to expand...
Click to collapse
Actually - never mind
I sorted it! That was easy!! And 4G now has a 4G+ and its even faster than before woooohoooo!! :highfive::highfive::highfive:

Please help
I am also stuck with Taiwan version and have already signed up to a 5G plan in Australia thinking these were all 5g phones. Please suggest what I should be doing.
---------- Post added at 12:50 PM ---------- Previous post was at 12:44 PM ----------
cheetah2k said:
Actually - never mind
I sorted it! That was easy!! And 4G now has a 4G+ and its even faster than before woooohoooo!! :highfive::highfive::highfive:
Click to expand...
Click to collapse
Please advise me what you did and how I can get over the 5G issue please
Thank you in advance

use samkey to change your csc to tgy , 5g sim card goes to second sim tray

cheetah2k said:
Actually - never mind
I sorted it! That was easy!! And 4G now has a 4G+ and its even faster than before woooohoooo!! :highfive::highfive::highfive:
Click to expand...
Click to collapse
[MENTION=414798]
@cheetah2k
Is changing to hk firmware version using Samkey what you ended up doing? Was it easy.... I am not Tech savvy. I got this phone from eBay seller who was showing in Sydney but the phone ended up coming from Taiwan

Mittesh said:
[MENTION=414798]
@cheetah2k
Is changing to hk firmware version using Samkey what you ended up doing? Was it easy.... I am not Tech savvy. I got this phone from eBay seller who was showing in Sydney but the phone ended up coming from Taiwan
Click to expand...
Click to collapse
This is the method I used (creds to user jabreel.torrin in the S10 forums. I did modify this though to suit the S20U) - You don't need to Odin flash the TGY firmware as its identical to the BRI - only CSC needs to change from BRI to TGY :good:
1. Buy 3 credits (can't buy 2) from this seller that on ebay that I used : https://www.ebay.com.au/itm/SamKey-Code-Reader-3-Credits-UNLOCK-Fast-Service/324110503100?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2648
2. After buying the Samkey credits you will be emailed the username and password for the Samkey App (you need this!)
3. Enable developer options on your phone: Settings > About phone > Software Information > Tap "build number" 8 times or until you see a pop-up message that says "Developer mode has been enabled".
4. Turn on USB debugging on your phone: Settings > Developer options > USB debugging > Allow USB Debugging > Tap "OK"
5. Go to www.samkey.org and download the Samsung USB drivers (if you havent installed any samsung software on the PC already) and the Samkey application
6. Install the drivers first, and then install Samkey application on your computer > Connect your phone to your computer with a usb cable > Login with the username/password you received from the ebay seller.
7. Click the "Read Info ADB" button to make sure your phone has been accepted by ADB
8. Insert the CSC code you want into the "Change CSC (Buyer)" field > With the BRI SM-G9880 you want to insert TGY (where is shows PHN in the pic below)
9. Click the "Change CSC" button > Confirm that you want to spend 1 or 2 credits (for me it was 1, but some report 2 used).
Let the application do it's work after which it will reboot and then you're good to go. :fingers-crossed:
For me it was seamless and worked so easy. Zero complaints. 5 min later I had a TGY phone - and I have reserve credits for the next Samsung phone I need to change Hope this helps guys!
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Thank you
cheetah2k
OMG I can't thank you enough for the detailed breakdown. You just saved me alot of headache. I will try it tonight and let you know how I go.
Thank you again

Mittesh said:
cheetah2k
OMG I can't thank you enough for the detailed breakdown. You just saved me alot of headache. I will try it tonight and let you know how I go.
Thank you again
Click to expand...
Click to collapse
No probs mate, dont forget to click thanks on my tutorial if it goes to plan
Now all i need is to get a Telstra sim (as theres coverage in my area) and then can use the Band N78 5G :laugh:

cheetah2k said:
No probs mate, dont forget to click thanks on my tutorial if it goes to plan
Now all i need is to get a Telstra sim (as theres coverage in my area) and then can use the Band N78 5G :laugh:
Click to expand...
Click to collapse
It's worked!!!! And it was super easy. Is it true that only Sim 2 works for 5G? I can see the 5G option on Sim 1 but haven't seen it connect. Not sure if it's cuz of no coverage or issue with phone Sim trays

I did this but I wouldn't recommend changing to TGY firmware as a Telstra user. You don't get band 28 700mhz carrier aggregation. So no 4gx . For some reason I only get it with the Taiwan CSC but you miss out on 5g , to me that is less of a big deal than no 700mhz band 28 pairing with other bands for 4gx. In other words you'll get 4g+ less with Hong Kong firmware but you'll get 5g.

pafc66 said:
I did this but I wouldn't recommend changing to TGY firmware as a Telstra user. You don't get band 28 700mhz carrier aggregation. So no 4gx . For some reason I only get it with the Taiwan CSC but you miss out on 5g , to me that is less of a big deal than no 700mhz band 28 pairing with other bands for 4gx. In other words you'll get 4g+ less with Hong Kong firmware but you'll get 5g.
Click to expand...
Click to collapse
If there a way to get both the options?

Mittesh said:
If there a way to get both the options?
Click to expand...
Click to collapse
Not at the moment.
Best to stay on Taiwan firmware as they appear to have 700mhz band 28 carrier aggregation and wait till they add the 5g option when their local networks commence it later this year. I'm told it's this time when Samsung will push a update to enable 5g capabilities to Taiwan firmware.

pafc66 said:
Not at the moment.
Best to stay on Taiwan firmware as they appear to have 700mhz band 28 carrier aggregation and wait till they add the 5g option when their networks commence it. I'm told it's this time when Samsung will push a update to enable 5g capabilities to Taiwan firmware.
Click to expand...
Click to collapse
Is there an option to go back to BRI Taiwan firmware once they enable 5G with the option of have both these bands at the stage?

Mittesh said:
Is there an option to go back to BRI Taiwan firmware once they enable 5G with the option of have both these bands at the stage?
Click to expand...
Click to collapse
Yeah, you'll just have to download the Taiwan firmware when they get that update and change the CSC with samkey back to BRI

pafc66 said:
Yeah, you'll just have to download the Taiwan firmware when they get that update and change the CSC with samkey back to BRI
Click to expand...
Click to collapse
If you change your CSC, will your next firmware update me for that country. Like I have just changed from BRI to TGY... Will be next update automatically be the Hong Kong version of firmware? Or will it go back to BRI?

Mittesh said:
If you change your CSC, will your next firmware update me for that country. Like I have just changed from BRI to TGY... Will be next update automatically be the Hong Kong version of firmware? Or will it go back to BRI?
Click to expand...
Click to collapse
You won't get a over the air update if you CSC doesn't match your firmware. You'll have to change the CSC to match your firmware. So change to BRI Taiwan CSC to receive the Taiwan update and vise versa if you have the Hong Kong firmware

pafc66 said:
You won't get a over the air update if you CSC doesn't match your firmware. You'll have to change the CSC to match your firmware. So change to BRI Taiwan CSC to receive the Taiwan update and vise versa if you have the Hong Kong firmware
Click to expand...
Click to collapse
So my phone was BRI Taiwan version and all I did was buy the Samkey credits and change CSC to TGY to enable 5G. Does that mean no more updates for me until I change it back to Taiwan?

pafc66 said:
I did this but I wouldn't recommend changing to TGY firmware as a Telstra user. You don't get band 28 700mhz carrier aggregation. So no 4gx . For some reason I only get it with the Taiwan CSC but you miss out on 5g , to me that is less of a big deal than no 700mhz band 28 pairing with other bands for 4gx. In other words you'll get 4g+ less with Hong Kong firmware but you'll get 5g.
Click to expand...
Click to collapse
Band 28 is available in the carrier band selection options FYI :good::good:

[SM-G9860] Is a Taiwan (BRI) S20+ technically identical to Hong Kong (TGY) S20+?

I bought a S20+ (SM-G9860, Snapdragon). It had a Taiwan CSC (BRI), I changed it to the Hongkong CSC (TGY) with Samkey (1 credit). For me it activates VoLTE and 5G. After changing the CSC a got an OTA update, which I installed. This changed the BASEBAND version to ATE5 (instead of ATCT). Bootloader/PDA/CSC are identical (BRI and TGY).
On reddit someone said changing his CSC from BRI->TGY increased his battery consumption (original thread). They suggestion that the BRI Taiwan version maybe missing antennas for the additional bands supported in HK firmware which could explain why there's a significant drain. Could this be right?
I am wondering are the Hong Kong and Taiwan versions of the S20+ hardware-wise identical? I am a bit 'worried' because I know the Hong Kong version support 5G 4200 Mhz and this frequency is not stated on the box of my Taiwan version:
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Hong Kong TGY (this version I got after changing CSC with Samkey):
Taiwan BRI (original out-of-the box firmware):
Thanks!

they are identical, and no, I don't have battery drain when changing to TGY. However, take note: when you change, you must change *both* the CSC & the firmware, and do clean factory reset afterwards. There is no drain, and 5G band also depend on the firmware *and* the CSC, so you must change both.

bluelavender said:
they are identical, and no, I don't have battery drain when changing to TGY. However, take note: when you change, you must change *both* the CSC & the firmware, and do clean factory reset afterwards. There is no drain, and 5G band also depend on the firmware *and* the CSC, so you must change both.
Click to expand...
Click to collapse
Once a new software update gets sent ota... Would that be considered as new firmware of the new CSC? I changed CSC from bri to TGY but never changed the firmware. After changing I got 5G which is what i changed for. I have got 1 new ota update since then. Do i still need to change firmware and if so how?

As far as I can see Firmware is already the same in BRI and TGY devices. So no need to change imo. Maybe someone can confirm?
https://www.sammobile.com/samsung/galaxy-s20-plus/firmware/#SM-G9860

Mittesh said:
Once a new software update gets sent ota... Would that be considered as new firmware of the new CSC? I changed CSC from bri to TGY but never changed the firmware. After changing I got 5G which is what i changed for. I have got 1 new ota update since then. Do i still need to change firmware and if so how?
Click to expand...
Click to collapse
No new firmware, this update only changed the baseband version to ATE5.

Mittesh said:
Once a new software update gets sent ota... Would that be considered as new firmware of the new CSC? I changed CSC from bri to TGY but never changed the firmware. After changing I got 5G which is what i changed for. I have got 1 new ota update since then. Do i still need to change firmware and if so how?
Click to expand...
Click to collapse
you have to. While, somehow, you can get ATE5 update (which is actually only baseband update), there's no guarantee future real firmware update will go to your set with differing firmware and CSC. There's another post from another guy in this forum who also end up updating the firmware, because error message with different csc and firmware in software update section.

But firmware is the same in Hong Kong TGY version and Taiwan BRI version. Completely identical.

bluelavender said:
you have to. While, somehow, you can get ATE5 update (which is actually only baseband update), there's no guarantee future real firmware update will go to your set with differing firmware and CSC. There's another post from another guy in this forum who also end up updating the firmware, because error message with different csc and firmware in software update section.
Click to expand...
Click to collapse
I really think that what you are saying is incorrect, there is no need to update the firmware in this specific case with TGY and BRI S20+'s. Let me illustrate this by a screenshot of the downloaded firmwares (both most recent versions) from Sammobile:
Look at the file sizes, the filenames, everything is 100% identical. The only difference is that de TGY CSC triggers the the baseband ATE5 update. So why should we flash an identical firmware after a CSC change BRI->TGY with Samkey?

Hi, when changing CSC, does it need also factory reset? I have BRI version and want caller ID back, but I don't want to lose any data during the process.
Thanks for answers.

Not necessary imo.

m0erty said:
Hi, when changing CSC, does it need also factory reset? I have BRI version and want caller ID back, but I don't want to lose any data during the process.
Thanks for answers.
Click to expand...
Click to collapse
No, you not need a factory reset after CSC change via Samkey.

ChromeFR said:
I really think that what you are saying is incorrect, there is no need to update the firmware in this specific case with TGY and BRI S20+'s. Let me illustrate this by a screenshot of the downloaded firmwares (both most recent versions) from Sammobile:
Look at the file sizes, the filenames, everything is 100% identical. The only difference is that de TGY CSC triggers the the baseband ATE5 update. So why should we flash an identical firmware after a CSC change BRI->TGY with Samkey?
Click to expand...
Click to collapse
As expected... No Odin firmware change needed to recieve updates.

Is VOLTE and WIFI Calling working on this model in your country...Please mention which country you are living...

niza2000in said:
Is VOLTE and WIFI Calling working on this model in your country...Please mention which country you are living...
Click to expand...
Click to collapse
I live in Romania and yes volte and vowifi are both working as expected. The one thing that you should know is that I had to manually add the apn for ims as in the screenshot below.

stefan243546 said:
I live in Romania and yes volte and vowifi are both working as expected. The one thing that you should know is that I had to manually add the apn for ims as in the screenshot below.
Click to expand...
Click to collapse
Thanks for your reply, it really help me to take decision.
Can you please re-upload the screenshot APN for IMS, i think its not properly uploaded and images are not visible.
Also do you have the option for adding Esim in this SD version.
Thanks

niza2000in said:
Thanks for your reply, it really help me to take decision.
Can you please re-upload the screenshot APN for IMS, i think its not properly uploaded and images are not visible.
Also do you have the option for adding Esim in this SD version.
Thanks
Click to expand...
Click to collapse
First off no esim sadly, and secondly the apn is specific for Orange Romania, so adding it to your phone will not make volte/vowifi work. You will have to take your carrier's apn from a friend who is in the same carrier or from the internet. Nevertheless I'll reupload the screenshots.
edit: the screenshots still seem to not be working, I'll give you a link to onedrive where I'll upload them: https://1drv.ms/f/s!AoksdHUtMyltgd15-duqZ_JyFMDzLw

stefan243546 said:
First off no esim sadly, and secondly the apn is specific for Orange Romania, so adding it to your phone will not make volte/vowifi work. You will have to take your carrier's apn from a friend who is in the same carrier or from the internet. Nevertheless I'll reupload the screenshots.
edit: the screenshots still seem to not be working, I'll give you a link to onedrive where I'll upload them: https://1drv.ms/f/s!AoksdHUtMyltgd15-duqZ_JyFMDzLw
Click to expand...
Click to collapse
No ESIM...
Thanks mate for reply....

How to identify correct firmware to upgrade - S20+ 5G Snapdragon G986U

Hello -
Guys for last few days i have been trying to install Android 11 OneUI 3.0 update to my S20+ 5G phone. Since i did not receive the update, i was trying to flash it. But i couldnt flash that, in fact, I softbricked my phone in trying so. I will try to explain details here, please guide me to identify the correct firmware to flash.
This phone is unbranded and USA variant, which I bought from someone. I don't have the box but it is unlocked and unbranded phone, any SIM works on it. I tried looking for the CSC and AP version, which I found
AP VERSION G986USQU1ATAW
CSC VERSION G986UOYN1ATAW
I could only find one firmware matching this, which was still Android 10. And it had CSC code = TMB on SamFW website. I was confused what my actual CSC is, i tried looking for with the "Phone Info" app and it mentioned the "Active CSC Code: XAA".
So I tried following firmwares from Samfw.com
Samsung Galaxy S20+ 5G SM-G986U - TMB - G986USQS1CTL1
Samsung Galaxy S20+ 5G SM-G986U - TMB - G986USQU1CTKH
Samsung Galaxy S20+ 5G SM-G986U1 - XAA - G986U1UES1CTL5
Samsung Galaxy S20+ 5G SM-G986U - SPR - G986USQS1CTL1
I couldnt flash with any of the above firmware. It mostly stucked while flashing "super.img", i was using Odin 3.14 patched.
After trying this flashing, my phone was softbricked and i was unable to flash any of the firmware but one thing worked (which i dont know why). I flashed AP, BL and CP with Samsung Galaxy S20+ 5G SM-G986U - TMB - G986USQU1ATAW since it's AP version and CSC was matching exactly same to my previous AP & CSC versions. But this firmware's CSC file was not being flashed to my phone, it was always getting stuck on flashing "prism.img", so i flashed CSC file with Samsung Galaxy S20+ 5G SM-G986U1 - XAA - G986U1UES1BTK1 and the phone thankfully restored back to Android 10. But now my software update section says "Your current software version isn't supported. Visit a service center."
And now after flashing, my CSC version is G986U1OYM1BTK1 which was G986UOYN1ATAW earlier. I read somewhere that in the CSC version when you check from *#1234#, the three letters after your phone model is the CSC code. According to this, for my actual firmware it was OYN i think (G986UOYN1ATAW) and now after flashing it is OYM i think (G986U1OYM1BTK1). I don't see any firmware website mentioning any firmware with this CSC code. I am very confused now, do i not have any updated firmware for my phone or i have been trying wrong firmwares.
I am attaching current screenshots below about current state, Please help me understanding how to get the right firmware version to flash. If anyone has same version and has flashed, please enlighten.
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To check the original CSC go to Settings, About Phone, Software Information, Service Provider SW ver. On the bottom string the last three letters will be your device’s original CSC Code. Doing a Factory Reset will restore it to the original firmware but be sure to backup your data.
You have a Multi-CSC device. Your best option to receive timely updates is setting the CSC to match your Service Provider. Go to "Settings" then "About phone". Write down your IMEI Number. Open dialer and enter *#272*IMEInumber# (In the thread replace IMEInumber with your actual IMEI Number). Press dial, you should see a screen with the list of available CSC codes for your device. Select the CSC for your Service Provider and tap the Install option.
Samsung's Smart Switch platform often times will offer updates before they're available via OTA. Be aware Android 11 One UI 3.0 isn't completely stable, many users are having issues after updating.

So my service Provider SW ver is "XAA/XAA/SPR", which means my CSC code should be SPR. My question is then why this Samsung Galaxy S20+ 5G SM-G986U - SPR - G986USQS1CTL1 did not work? :/ It should have.
Also, why do i see the same AP version and CSC version with this firmware Samsung Galaxy S20+ 5G SM-G986U - TMB - G986USQU1ATAW, whose CSC code looks to be TMB. Its very much confusing.
AP VERSION G986USQU1ATAW
CSC VERSION G986UOYN1ATAW
Plus, this doesn't work in my country i believe. #272*IMEInumber#

So the phone isn't an unbranded device, it's branded by Sprint which is now T-mobile. OTA Updates aren't going to be available unless you're on Sprint/T-Mobile's Network using a Sprint/T-Mobile SIM Card. I'm not sure where you'll find the correct FW for your phone, that's why performing a Factory Reset is going to be the best option to receive OTA's.

Change the csc to xaa and reset the phone and install the software in connection with the patched Odin
Download Samsung Galaxy S20+ SM-G986U1 XAA USA G986U1UES1CTL5 firmware
Fast download latest Samsung Galaxy S20+ firmware SM-G986U1 from USA with G986U1UES1CTL5 and Android version 11
www.sammobile.com

In which country do you use the device and what is the operator name you use?

altiparmak1982 said:
In which country do you use the device and what is the operator name you use?
Click to expand...
Click to collapse
Pakistan, operator is Zong.

kas07 said:
Pakistan, operator is Zong.
Click to expand...
Click to collapse
Since it's a Sprint Branded device there is no FW change will allow you to receive OTA's. The only option is Smart Switch after you do a Factory Reset back to the original Sprint FW. Curious why you aquired a US S20 for use in Pakistan? The Global Exynos variant would have been appropriate if call features and updates are a priority.
altiparmak1982 said:
Change the csc to xaa and reset the phone and install the software in connection with the patched Odin
Download Samsung Galaxy S20+ SM-G986U1 XAA USA G986U1UES1CTL5 firmware
Fast download latest Samsung Galaxy S20+ firmware SM-G986U1 from USA with G986U1UES1CTL5 and Android version 11
www.sammobile.com
Click to expand...
Click to collapse
The Original CSC can't be modified, it will remain SPR. This FW is for a US Unbranded device, it won't receive OTA's for a Sprint Branded phone. Since the user is in Pakistan and not on Sprint's Network or using a Sprint SIM the only option is downloading updates via Smart Switch after the original FW is restored by Factory Resetting the device.

Well i acquired it because it had snapdragon and 12GB RAM unlike the global exynos version and its not branded, there's no logo and its totally unlocked. So i didnt have any idea it will have Sprint FW.
SmartSwitch doesnt show any update. And now even my phone says "Your current software version isn't supported. Visit a service center."

altiparmak1982 said:
Change the csc to xaa and reset the phone and install the software in connection with the patched Odin
Download Samsung Galaxy S20+ SM-G986U1 XAA USA G986U1UES1CTL5 firmware
Fast download latest Samsung Galaxy S20+ firmware SM-G986U1 from USA with G986U1UES1CTL5 and Android version 11
www.sammobile.com
Click to expand...
Click to collapse
I already have tried flashing with this firmware it dint work. But i didn't change CSC before trying, is it changeable?

Since the original CSC is SPR it is a Sprint Branded device even though it may be unlocked. Updates are pushed by Samsung for specific devices based on the device's Original CSC, not the Active CSC. The only way you'll receive updates is via Smart Switch with the phone connected to a PC, Laptop or Tablet after you've installed the Sprint FW.
Not sure how valuable the update will be to you since it's structured for Sprint but either way you might consider holding off on Android 11 OneUl 3.0, it's not yet a stable version. Many of the recent posts here are S20 users who've developed issues after installing the 3.0 update.

varcor said:
Since the original CSC is SPR it is a Sprint Branded device even though it may be unlocked. Updates are pushed by Samsung for specific devices based on the device's Original CSC, not the Active CSC. The only way you'll receive updates is via Smart Switch with the phone connected to a PC, Laptop or Tablet after you've installed the Sprint FW.
Not sure how valuable the update will be to you since it's structured for Sprint but either way you might consider holding off on Android 11 OneUl 3.0, it's not yet a stable version. Many of the recent posts here are S20 users who've developed issues after installing the 3.0 update.
Click to expand...
Click to collapse
I suggested such a way because the user says xaa for csc. I agree with what you said except that if the SPR software burns, will the SPR not ask for the sim card at startup?

altiparmak1982 said:
I suggested such a way because the user says xaa for csc. I agree with what you said except that if the SPR software burns, will the SPR not ask for the sim card at startup?
Click to expand...
Click to collapse
Can't say but typically a SIM isn't required to setup a Galaxy device. The real problem is the user wants updates for a device which is operating outside of it's native region. Many users who opted for the Snapdragon SoC to avoid a Exynos variant are having the same issues. The Sprint CSC is in conflict with his region.
The Active CSC can be changed to function in Pakistan but it can't be updated. I've explained the only method to update the device in his/her region but to what benefit? If a user has a priority for updates and call features the best bet is always acquiring their Service Provider's device. Samsung is the real culprit here by using competing chipsets on the same model numbered devices.

varcor said:
To check the original CSC go to Settings, About Phone, Software Information, Service Provider SW ver. On the bottom string the last three letters will be your device’s original CSC Code. Doing a Factory Reset will restore it to the original firmware but be sure to backup your data.
You have a Multi-CSC device. Your best option to receive timely updates is setting the CSC to match your Service Provider. Go to "Settings" then "About phone". Write down your IMEI Number. Open dialer and enter *#272*IMEInumber# (In the thread replace IMEInumber with your actual IMEI Number). Press dial, you should see a screen with the list of available CSC codes for your device. Select the CSC for your Service Provider and tap the Install option.
Samsung's Smart Switch platform often times will offer updates before they're available via OTA. Be aware Android 11 One UI 3.0 isn't completely stable, many users are having issues after updating.
Click to expand...
Click to collapse
Hello sir I have S20+ 5g Canadian, g986w Snapdragon model, nd I'm frm India I want to change csc of Indian but there is no options for INS/INU , there is only 8,10 csc option how can I change to indian ??? Plssss help TIA... Yeahhh I also downgraded it to android 10 oneui 2.5

Finally upgraded my Samsung Galaxy S20+ Snapdragon SM-G986U to ANDROID 11, ONE UI 3.1
After getting failed in failing many of the ROMs earlier, I tried latest android 11 of 1 June, 2021 build of CSC "XAS" and model "G986U" and flashed only AP, BL & CP file. Didn't flash the CSC file, CSC file was still the older, which worked after last soft-bricked (CSC: SM-G986U1 - XAA - G986U1UES1BTK1)
CSC - XAS: https://samfw.com/firmware/SM-G986U/XAS/G986USQS2DUE2
(Please read earlier comments for context)

kas07 said:
Finally upgraded my Samsung Galaxy S20+ Snapdragon SM-G986U to ANDROID 11, ONE UI 3.1
After getting failed in failing many of the ROMs earlier, I tried latest android 11 of 1 June, 2021 build of CSC "XAS" and model "G986U" and flashed only AP, BL & CP file. Didn't flash the CSC file, CSC file was still the older, which worked after last soft-bricked (CSC: SM-G986U1 - XAA - G986U1UES1BTK1)
CSC - XAS: https://samfw.com/firmware/SM-G986U/XAS/G986USQS2DUE2
(Please read earlier comments for context)
Click to expand...
Click to collapse
Hey, I have a similar issue and I live in the same country, I got a unlocked Samsung s20+ 5g snapdragon variant and I have already done factory reset but it doesn't show any updates in the settings it just says "Your current software version isn't supported." and it says software is latest version in smart switch.
My CSC is a bit different than yours: XAA/XAA/WWD
I have attached the smart switch pic, can anyone help me update the phone to the latest version?
Also a question to kas07, was your phone official pta approved or cpid?

General Found a way to change the CSC on our Fold 4!

Hi guys,
This is not gonna be much info but to let you know it is possible, at a cost.
So I bought an F936N - CSC: KTC (Korean). It came with the KT branding and the nasty bloatware with the extra setting menu for KT.
I was sick of it. I tried Samkey, I tried Samfw frp tool. Nothing worked.
I personally don't care about tripping knox, I don't use Samsung pay, password, or the file vault stuff. I just use google pay (Wallet now)
So I followed this guide:
Change CSC on Samsung Devices (Root)​
Install X-plore File Manager app or any other root browser from the Play Store. [googleplay url=”https://play.google.com/store/apps/details?id=com.lonelycatgames.Xplore”]
Launch the app, go to Root Explorer option and change R/O to R/W.
Navigate to /efs/imei/ folder, edit the CSC code in the mps_code.dat file and save the changes.
Then go to /system/csc/ folder and edit your CSC in the sales_code.dat file. (System/CSC did not exist on my phone. but I did find the file sales_code.dat file within other folders that were named as the CSC such as KTC, SKT, KOO. I deleted all the folders except for KOO.
I just rebooted into download mode and flashed KOO firmware and it worked! No more KT carrier branding crap!
I've yet to try OTA. Not sure if it is no longer working or it is working. I'll wait for an update and see if it picks it up or not.
Update: OTA works
Not sure if we can replace the files from a different vairant such as F936B and flash its firmware... Would that give us the ability to change the phone completely?? Definitely something I am willing to tinker with on my phone but I would need someone to send me the files with an F936B and that person must have their phone rooted.
Cheers!

It can't be done with SamFW Tool v3?

sowed said:
It can't be done with SamFW Tool v3?
Click to expand...
Click to collapse
Yes SamFW works 3.1 works but 3.2 failed not sure if they released v 3.3 yet for samfw

sowed said:
It can't be done with SamFW Tool v3?
Click to expand...
Click to collapse
It did not work on my F936N variant. Maybe it does work on other variants such as F936B

Have you root your phone? Will the camera work properly if rooted?

xiaoxiaokeai said:
Have you root your phone? Will the camera work properly if rooted?
Click to expand...
Click to collapse
Camera won't work if rooted with me...

hkbazzi said:
Hi guys,
This is not gonna be much info but to let you know it is possible, at a cost.
So I bought an F936N - CSC: KTC (Korean). It came with the KT branding and the nasty bloatware with the extra setting menu for KT.
I was sick of it. I tried Samkey, I tried Samfw frp tool. Nothing worked.
I personally don't care about tripping knox, I don't use Samsung pay, password, or the file vault stuff. I just use google pay (Wallet now)
So I followed this guide:
Change CSC on Samsung Devices (Root)​
Install X-plore File Manager app or any other root browser from the Play Store. [googleplay url=”https://play.google.com/store/apps/details?id=com.lonelycatgames.Xplore”]
Launch the app, go to Root Explorer option and change R/O to R/W.
Navigate to /efs/imei/ folder, edit the CSC code in the mps_code.dat file and save the changes.
Then go to /system/csc/ folder and edit your CSC in the sales_code.dat file. (System/CSC did not exist on my phone. but I did find the file sales_code.dat file within other folders that were named as the CSC such as KTC, SKT, KOO. I deleted all the folders except for KOO.
I just rebooted into download mode and flashed KOO firmware and it worked! No more KT carrier branding crap!
I've yet to try OTA. Not sure if it is no longer working or it is working. I'll wait for an update and see if it picks it up or not.
Update: OTA works
Not sure if we can replace the files from a different vairant such as F936B and flash its firmware... Would that give us the ability to change the phone completely?? Definitely something I am willing to tinker with on my phone but I would need someone to send me the files with an F936B and that person must have their phone rooted.
Cheers!
Click to expand...
Click to collapse
you can change the csc with samkey! just disabble/remove all sim cards first from the phone, wifi also. no need for root!!

Do you still have your camera working, after Ruth? Is it possible to get root to do what is necessary and abandon them? In this case, will the camera work?

cristian codrin said:
you can change the csc with samkey! just disabble/remove all sim cards first from the phone, wifi also. no need for root!!
Click to expand...
Click to collapse
Tried every combination you can think of. It does not work with KTC

bashirchik said:
Do you still have your camera working, after Ruth? Is it possible to get root to do what is necessary and abandon them? In this case, will the camera work?
Click to expand...
Click to collapse
Once rooted you are never going to go back to stock. It physically burns a part of the SoC away. Samsung may have workarounds to fix this but no developer has, as yet, found any. It would probably be in the initialisation of the SoC in the factory. Very Low level format stuff...
Simple explanation, once rooted there's no going back even if you flash a stock ROM...

hkbazzi said:
Hi guys,
This is not gonna be much info but to let you know it is possible, at a cost.
So I bought an F936N - CSC: KTC (Korean). It came with the KT branding and the nasty bloatware with the extra setting menu for KT.
I was sick of it. I tried Samkey, I tried Samfw frp tool. Nothing worked.
I personally don't care about tripping knox, I don't use Samsung pay, password, or the file vault stuff. I just use google pay (Wallet now)
So I followed this guide:
Change CSC on Samsung Devices (Root)​
Install X-plore File Manager app or any other root browser from the Play Store. [googleplay url=”https://play.google.com/store/apps/details?id=com.lonelycatgames.Xplore”]
Launch the app, go to Root Explorer option and change R/O to R/W.
Navigate to /efs/imei/ folder, edit the CSC code in the mps_code.dat file and save the changes.
Then go to /system/csc/ folder and edit your CSC in the sales_code.dat file. (System/CSC did not exist on my phone. but I did find the file sales_code.dat file within other folders that were named as the CSC such as KTC, SKT, KOO. I deleted all the folders except for KOO.
I just rebooted into download mode and flashed KOO firmware and it worked! No more KT carrier branding crap!
I've yet to try OTA. Not sure if it is no longer working or it is working. I'll wait for an update and see if it picks it up or not.
Update: OTA works
Not sure if we can replace the files from a different vairant such as F936B and flash its firmware... Would that give us the ability to change the phone completely?? Definitely something I am willing to tinker with on my phone but I would need someone to send me the files with an F936B and that person must have their phone rooted.
Cheers!
Click to expand...
Click to collapse
I cannot find the "sales_code.dat" file in my s21+

hai9997 said:
I cannot find the "sales_code.dat" file in my s21+
Click to expand...
Click to collapse
Hmmm, not sure what you can do here.

I bought this in India which is international device but I can’t use 5G in India it says device is 5G incompatible. Spoke with few people some said flash stock rom to get 5G also paid money to express unlocks they couldn’t do it either is it possible to get 5G on this phone z fold 4 if someone helps me I’m willing to pay them too.
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"lightbox_download": "Download",
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Legion9955 said:
I bought this in India which is international device but I can’t use 5G in India it says device is 5G incompatible. Spoke with few people some said flash stock rom to get 5G also paid money to express unlocks they couldn’t do it either is it possible to get 5G on this phone z fold 4 if someone helps me I’m willing to pay them too.
View attachment 5853751
Click to expand...
Click to collapse
That is not an international device, F936B. Yours is an F936N device, It is for Korea and for use on their particular networks and not intended for sale by Samsung outside of that area.

[email protected] said:
That is not an international device, F936B. Yours is an F936N device, It is for Korea and for use on their particular networks and not intended for sale by Samsung outside of that area.
Click to expand...
Click to collapse
My local mobile store sold me this saying it’s international device and all the SIM cards works on it including my t mobile from USA only problem is I can’t use 5G on jio india or Airtel india any work around for this ?

Legion9955 said:
My local mobile store sold me this saying it’s international device and all the SIM cards works on it including my t mobile from USA only problem is I can’t use 5G on jio india or Airtel india any work around for this ?
Click to expand...
Click to collapse
Also my phone doesn’t have any branding from carrier.

Legion9955 said:
My local mobile store sold me this saying it’s international device and all the SIM cards works on it including my t mobile from USA only problem is I can’t use 5G on jio india or Airtel india any work around for this ?
Click to expand...
Click to collapse
It is definitely not an international, F936B, device.
The Korean, F936N, device is only compatible with 1 Indian 5G network band, N78 (3500). See screenshot and link...
Will Samsung Galaxy Z Fold4 work in India?
In this page we are going to show you the compatibility of Samsung Galaxy Z Fold4 with the mobile networks of India and with the telephony operators that provide service in India.
www.kimovil.com
You will need to find an Indian carrier that uses the N78 band in your area, if any.

[email protected] said:
It is definitely not an international, F936B, device.
The Korean, F936N, device is only compatible with 1 Indian 5G network band, N78 (3500). See screenshot and link...
View attachment 5853801
Will Samsung Galaxy Z Fold4 work in India?
In this page we are going to show you the compatibility of Samsung Galaxy Z Fold4 with the mobile networks of India and with the telephony operators that provide service in India.
www.kimovil.com
You will need to find an Indian carrier that uses the N78 band in your area, if any.
Click to expand...
Click to collapse
There are 2 carries who support 5G in India is Airtel and jio which supports.
Airtel 5G bands​
Airtel supports the following 5G bands in India –
900 MHz (n8)
1800 MHz (n3)
2100 MHz (n1)
3300 MHz (n78)
26 GHz (n258)
Reliance Jio 5G bands​
Reliance Jio supports the following 5G bands in India –
700 MHz (n28)
3300 MHz (n78)
26 GHz (n58)
is there is any way I can install custom rom or any work around to use 5G

Legion9955 said:
There are 2 carries who support 5G in India is Airtel and jio which supports.
Airtel 5G bands​
Airtel supports the following 5G bands in India –
900 MHz (n8)
1800 MHz (n3)
2100 MHz (n1)
3300 MHz (n78)
26 GHz (n258)
Reliance Jio 5G bands​
Reliance Jio supports the following 5G bands in India –
700 MHz (n28)
3300 MHz (n78)
26 GHz (n58)
is there is any way I can install custom rom or any work around to use 5G
Click to expand...
Click to collapse
You are out of luck as you have already found out. The only way around it would be to get the entire motherboard which has the Korean modem, and replace it with an international, F936B, motherboard and modem. Changing the CSC code or flashing a custom ROM, even if one exists, will not change the devices hardware.
TOP TIP: Always buy the model of device that Samsung intended for use in your location.

Thanks a lot for clarification brother. I think I’m gonna sell it asap!

Question Need help to Convert SM-F936U/DS ATT Fold 4 to Indian Fold 4 version?

So I am using AT&T version Zfold 4 model SM-F936U/DS in India and my software version is as follows:
Build number
SP2A.220305.013.F936USQU1AVGA
Service provider software version
SAOMC_SM-F936U_OYN_GCF_12_0003
GCF/GCF.GCF/XAA
Its stuck on android 12 May update.
I want to flash Indian firmware to make it Indian version of Z fold 4 for faster updates and enabling the call recorder.
What do I need to do? Any help will be appreciated. If this is answered anywhere please provide links to that thread and I will delete this one.
I am totally confused about CSC, firmware version, carrier version etc.

Not gonna happen without root, even then might be difficult.
The Indian model is a F936B model. Trying to flash the firmware on it is like trying to flash IOS on an android.
Did see a way to change CSC in the forum however I believe you needed to have the compatible variant as it needed the OXM ROM flashed 1st.

ultramag69 said:
Not gonna happen without root, even then might be difficult.
The Indian model is a F936B model. Trying to flash the firmware on it is like trying to flash IOS on an android.
Did see a way to change CSC in the forum however I believe you needed to have the compatible variant as it needed the OXM ROM flashed 1st.
Click to expand...
Click to collapse
Thanks for the reply. I am browsing the forums for a solution and so far have got nothing. I don't want to root the device as of now.

ultramag69 said:
Not gonna happen without root, even then might be difficult.
The Indian model is a F936B model. Trying to flash the firmware on it is like trying to flash IOS on an android.
Did see a way to change CSC in the forum however I believe you needed to have the compatible variant as it needed the OXM ROM flashed 1st.
Click to expand...
Click to collapse
Hii have a zfold f936b bought from eBay.
It says IMEI is 00000000 and when I insert sim nothing happens.
Any idea what are my options ?

Adv.Chirag said:
So I am using AT&T version Zfold 4 model SM-F936U/DS in India and my software version is as follows:
Build number
SP2A.220305.013.F936USQU1AVGA
Service provider software version
SAOMC_SM-F936U_OYN_GCF_12_0003
GCF/GCF.GCF/XAA
Its stuck on android 12 May update.
I want to flash Indian firmware to make it Indian version of Z fold 4 for faster updates and enabling the call recorder.
What do I need to do? Any help will be appreciated. If this is answered anywhere please provide links to that thread and I will delete this one.
I am totally confused about CSC, firmware version, carrier version etc.
Click to expand...
Click to collapse
Your phone, F936U, is carrier locked to the U.S. network, AT&T, and if genuine, can only receive updates when connected on their network as unlike other models, AT&T issue their own firmware updates.
This model also has a locked bootloader which prevents the flashing of alternative stock firmware.
Also, it seems strange that a phone that was only launched in August 2022 would have a, "May", update. Install DevCheck, free from the Play Store and check if you have a clone phone.

Emmanuel Spadafora said:
Hii have a zfold f936b bought from eBay.
It says IMEI is 00000000 and when I insert sim nothing happens.
Any idea what are my options ?
Click to expand...
Click to collapse
The phones efs/file is corrupt. See...
What is EFS folder ?
Hi All, I came to know the EFS folder is very important in Samsung phones. I didn't cared about it and flashed a different region ROM (XEU->OZS). Each thing is working fine. I can remember that there used to be some files inside the EFS folder...
forum.xda-developers.com
I have never been able to repair an efs/file but here is a link to someone who claims to have done so...
[GUIDE] how to fix EFS Damaged on samsung devices [EASY!]
Edited in 2022 to make it look a bit better! *WARNING* *TAKE A NANDROID BACKUP OF EFS AND BASEBAND BEFORE STARTING* Hello people, first I want to say that this is my first guide so it doesn't really look professional but I am doing my best to...
forum.xda-developers.com

[email protected] said:
Your phone, F936U, is carrier locked to the U.S. network, AT&T, and if genuine, can only receive updates when connected on their network as unlike other models, AT&T issue their own firmware updates.
This model also has a locked bootloader which prevents the flashing of alternative stock firmware.
Also, it seems strange that a phone that was only launched in August 2022 would have a, "May", update. Install DevCheck, free from the Play Store and check if you have a clone phone.
Click to expand...
Click to collapse
I got it carrier unlocked. Everything works fine in India with major carriers, even getting 5G to work here. Attaching screenshots of DevCheck
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Adv.Chirag said:
I got it carrier unlocked. Everything works fine in India with major carriers, even getting 5G to work here. Attaching screenshots of DevCheck
View attachment 5789875View attachment 5789881
Click to expand...
Click to collapse
Seems genuine. Your mention of a May update threw me.
It is running the F936USQU1AVGA firmware which it was launched with and therefore, has never received an update.
However, it is still a bootloader locked model, even though you have it carrier unlocked. The only way to update it is to insert an AT&T SIM card and connect to their network in the US. Other than that, you will need to do a search to see if there are any custom ROM's that utilises the locked AT&T bootloader. Alternatively, just carry on using it as it is

[email protected] said:
Seems genuine. Your mention of a May update threw me.
It is running the F936USQU1AVGA firmware which it was launched with and therefore, has never received an update.
However, it is still a bootloader locked model, even though you have it carrier unlocked. The only way to update it is to insert an AT&T SIM card and connect to their network in the US. Other than that, you will need to do a search to see if there are any custom ROM's that utilises the locked AT&T bootloader. Alternatively, just carry on using it as it is
Click to expand...
Click to collapse
Thanks for clearing these things for me. I appreciate it.

No experience with AT&T but if they release their firmware online then you should be able to download & flash latest using ODIN.
Good Luck....

ultramag69 said:
No experience with AT&T but if they release their firmware online then you should be able to download & flash latest using ODIN.
Good Luck....
Click to expand...
Click to collapse
Thanks

i dont think its possible, India phone comes with 2 physical sim slots or an esim option for the second sim where as the AT&T which you and I have, comes only with single physical sim.

Adv.Chirag said:
So I am using AT&T version Zfold 4 model SM-F936U/DS in India and my software version is as follows:
Build number
SP2A.220305.013.F936USQU1AVGA
Service provider software version
SAOMC_SM-F936U_OYN_GCF_12_0003
GCF/GCF.GCF/XAA
Its stuck on android 12 May update.
I want to flash Indian firmware to make it Indian version of Z fold 4 for faster updates and enabling the call recorder.
What do I need to do? Any help will be appreciated. If this is answered anywhere please provide links to that thread and I will delete this one.
I am totally confused about CSC, firmware version, carrier version etc.
Click to expand...
Click to collapse
Hi Chirag,
were you able to update your phone? I have the same model(SM-F936U/DS) and stuck with an old update and no new updates show up even though Andriod 13 has been rolled out for the Indian variants.
if there is no possibility of updating the phone then I might consider selling it! any help woud be appreciated.

chakraa2 said:
Hi Chirag,
were you able to update your phone? I have the same model(SM-F936U/DS) and stuck with an old update and no new updates show up even though Andriod 13 has been rolled out for the Indian variants.
if there is no possibility of updating the phone then I might consider selling it! any help woud be appreciated.
Click to expand...
Click to collapse
There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.

Adv.Chirag said:
There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.
Click to expand...
Click to collapse
Hi Chirag,
Thanks for the revert. Thats a bummer that we can't do anything with the update. I can still make my peace with the slow updates but having no updates especially the security updates is very concerning.
I will keep you posted in case I happen to come across any solution to this.
Regards,
Amit.

Adv.Chirag said:
I got it carrier unlocked. Everything works fine in India with major carriers, even getting 5G to work here. Attaching screenshots of DevCheck
View attachment 5789875View attachment 5789881
Click to expand...
Click to collapse
may I ask how you able to unlock it? Who did you go to?

I would say just start going through the different csc that's how I got mine to show the new up date then I just went back to gfc
Adv.Chirag said:
There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.
Click to expand...
Click to collapse
I would say just start changing csc until it comes up that's how I got mine to show then January update and then I went back to GFC

shorty9210 said:
I would say just start going through the different csc that's how I got mine to show the new up date then I just went back to gfc
I would say just start changing csc until it comes up that's how I got mine to show then January update and then I went back to GFC
Click to expand...
Click to collapse
Hi, Do you mind listing out the csc version that you used? Also any tips on how to flash it would be appreciated . The lack of software update is really driving me nuts man.

Adv.Chirag said:
There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.
Click to expand...
Click to collapse
Hi Chirag,
I can confirm the method mentioned shorty9210 indeed works! I just changed the CSC to T-Mob and the updates have started flowing. Just use the samFw.com tool to change the CSC, you will get T-MOB logo once you have changed the CSC but the updates will come by. It didnt delete the data too. Couldnt be any happier!
Give it a shot!
Cheers,
Amit.

shorty9210 said:
I would say just start going through the different csc that's how I got mine to show the new up date then I just went back to gfc
I would say just start changing csc until it comes up that's how I got mine to show then January update and then I went back to GFC
Click to expand...
Click to collapse
you are a life saver sir! Thanks so much! I changed the csc to T-Mob and the updates are flowing! A quick question though do we need to change back and forth to GFC everytime theres an update? For now mine is at T-MOB.