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[Guide] [How To] Downgrade I9505 4.4.2 to 4.3.1

:laugh:Hello guys,
This is my first tutorial on the XDA-developers forum, in order to improve myself and be more efficient, do not hesitate to comment, or ask questions, I will be more then happy to answer since I have spent so much time on this, using two different I9505, mine and my boss's. So without further ado, let's get started
Here is a full guide on how to downgrade your I9505 from 4.4.2 to 4.3. KNOX WILL TRIGGER, there are other tutorials that show how to downgrade 4.4.2 to 4.3 without triggering the knox, I will explain some of them, but they are not 100% successful.
Do it on your own risk, neither me nor XDA-developers will be responsible if you brick or damage your phone.​Nevertheless, if you follow those exact steps, you won't have any problem (you may actually have some, but we can solve them together).
Requirements:
Samsung galaxy S4 I9505
Rooted phone
CWM or any custom Recovery
CyanogenMod 10.2.1 [click here] (jellybean 4.3.1) or any other custom with its proper kernel
Google apps jellybean [here]
(May need) Modem FNC4 or any above FNB8 [here]
(May need) Pit File to resolve some problems [here]
[KNOX 0x1 (triggered) WORKS 100%]
[Step 1: Optional, only if you can root your phone]
Before we start, I advice you backup your phone, save your EFS folder which contains your IMEI and other "sensitive information" related to your phone:
To do that, first you need to root your phone, then use a file explorer such as "ES FILE EXPLORER".
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"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Go to your explorer and turn on "root explorer".
Once you have done that, go to your root folder.
Copy the folder called EFS to your SD Card.
(Optional)Make another copy on your HDD or file-hosting provider.
[Step 2: Installing the rom]
Copy your CyanogenMod or any other 4.3 custom fw + Google apps into your sdcard
Shutdown your phone
Press and hold down volume up, home button and power button to start in recovery mode (for about 5secondes)
Wipe data/cache (if you have philztouch, chose that you will install a new rom) and press YES
Advanced -> Wipe dalvik cache YES
Install zip from sdcard -> chose cyanogenmod zip file -> YES
Install zip from sdcard -> chose gapps zip file -> YES
Reboot your computer.
[Step 3: Resolving some problems]
If the phone application crashes whenever you try to make a phone-call, then you should flash your modem.
1.Shutdown you phone.
2.Press and hold down volume down, home button and power button to start in download mode until you see the confirmation, then press up to continue
3.Plug your micro usb cable into your phone, go to odin
4.Select modem (or CP for odin 3.09) and select the modem file
5.Uncheck Autoreboot
6.Click Start
7.Once done, unplug your cable, take off the battery, put it back, redo steps 2 to 4
8.Check this time Autoreboot and Start the process
If you flash your phone and you don't have the sound, then I advice you go back to 4.4.2, and follow this guide from the beginning
[KNOX 0x0 (not triggered) WIFI OFF]
I do see the point to go back to 4.3 (a lot of applications don't work properly on Kitkat + better performances for the S4 on Jellybean), however, I don't know if someone can use his phone without the wifi. Anyway, if you want you can try this method, for simply go back to 4.3, use saferoot and install mobile odin to go to 4.4.2 rooted, without triggering the knox (be aware that there is a simple method which roots the 4.4.2 but this doesn't work on newer 4.4.2).
I remind you that KNOX triggers only if you use a custom rom or modified kernel, in that case Knox turns to 0x1, and this cannot be undone.
Instead of writing my method, I find out two threads on xda.
First one, you cannot make phonecalls unless you flash the modem, and then you won't have the wifi anymore.[here]
Second, not tested yet, but it is promising, you can find out [here]
That's it guys, hope this will help you find your happiness.

I get 'No SIM' after 4.4.2 update. Any solution dear?

Sim adapter?
tariq2kn said:
I get 'No SIM' after 4.4.2 update. Any solution dear?
Click to expand...
Click to collapse
Ohhh noo sim, did you have a nano sim with an adapter or something ? I get this with my nanosim with the adapter

cefkiller said:
Ohhh noo sim, did you have a nano sim with an adapter or something ? I get this with my nanosim with the adapter
Click to expand...
Click to collapse
No adapter used.
My phone seems to be region locked, btu. I had an unlocking pin code to use another sim. But, when I am using the phone in India, It doesn't asks the pin but I get No SIM, I can see the signals on the statusbar & in about/status. It is not able to resolve the network. The /system/csc/customer.xml file states the mmc 404 as network blocked. The changing of network bands is also not possible. It is set by default at lte/wcdma/gsm.
I tried downgrading to 4.3 but got the phone in emergency mode, probably due to the locked bootloader. The Service Mode by *#0011# doesn't moves after the initial page.
How do I get through this mess? Kindly help in solving the issue.

tariq2kn said:
No adapter used.
My phone seems to be region locked, btu. I had an unlocking pin code to use another sim. But, when I am using the phone in India, It doesn't asks the pin but I get No SIM, I can see the signals on the statusbar & in about/status. It is not able to resolve the network. The /system/csc/customer.xml file states the mmc 404 as network blocked. The changing of network bands is also not possible. It is set by default at lte/wcdma/gsm.
I tried downgrading to 4.3 but got the phone in emergency mode, probably due to the locked bootloader. The Service Mode by *#0011# doesn't moves after the initial page.
How do I get through this mess? Kindly help in solving the issue.
Click to expand...
Click to collapse
Mmm I am afraid your phone is region locked, in this case it is very difficult to resolve the issue, for example if you are in Turkey your phone must be registered through a service, or purchased locally, I don't know maybe in India it is the same, meanwhile, try using your original sim Card, if it works, try using another sim card, i have a sim card that works on my Oneplus One but doesn't on the S4, it is crazy but what can we do. Finally, (before selling or throwing out your phone) try to visit this thread it might be helpful to follow those steps, visit all the links there, each one propose a solution. Hope you will find your happiness.
Regards.
Moncef

Update Camera firmware *#34971539#

In all Galaxy family there is this code to see the firmware version of the camera
*#34971539#
When you enter it, this screen appears:
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"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
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}
You can see that the "phone to cam" options are darker and you can´t select them.
When you click on the first option, the "version check" you can see that it isn´t updated
The phone versions are newer than the ones written on the Camera.
Other versiones just need to add a small file called 1q2w3e4r.key to the main memory and then the options to write the new version can be selected without root or any mod, but with this one doesn´t work this way.
Anyone know a way to do it?

I have the same data.

Maybe there is a rom that let you write the firmware... some kind of developer rom

Any idea?

I also have this problem with my S6 but I couldn't do anything until now ..maybe some clever guys can help us

I have (still) not rooted or modified my phone and my camera fw is like yours not the same like the phone fw. i dont think its a bug...

csritian said:
I also have this problem with my S6 but I couldn't do anything until now ..maybe some clever guys can help us
Click to expand...
Click to collapse
Hope so!
With my old s5 it only works with one ROM and a file, but I don't find any for this

I upgraded the firmware and now I have a newer firmware on the phone but the camera still with the original one..
Any idea on this?

Pay attention to LOAD. That's the one that the phone's camera is using. Days of updating camera firmware are over, for the past few years. No need anymore.
Sent from my SM-G935W8 using XDA-Developers mobile app

Idan73 said:
Pay attention to LOAD. That's the one that the phone's camera is using. Days of updating camera firmware are over, for the past few years. No need anymore.
Sent from my SM-G935W8 using XDA-Developers mobile app
Click to expand...
Click to collapse
So why isn't the same?
On the S3 and S5 it was exactly the same and when you added the correct files and you updated it appears the same on Cam ver. Load ver. and Phone ver.

sefelizrc said:
In all Galaxy family there is this code to see the firmware version of the camera
*#34971539#
When you enter it, this screen appears:
You can see that the "phone to cam" options are darker and you can´t select them.
When you click on the first option, the "version check" you can see that it isn´t updated
The phone versions are newer than the ones written on the Camera.
Other versiones just need to add a small file called 1q2w3e4r.key to the main memory and then the options to write the new version can be selected without root or any mod, but with this one doesn´t work this way.
Anyone know a way to do it?
Click to expand...
Click to collapse
Also when I add to the phone memory this small file I talked about this is what is happens...
It says: "Update firmware" and the option now appears in dark grey like the others.
The problem is that I don't have the files on the same folder so I can't select the other options and when I say yes to this popup I have to wait few minutes and any update appears.

I think I have the camera firmware files found.
The files are probably stored in:
/system/vendor/firmware
or
/vendor/firmware
In Samsung Stock ROM's.
When I copy the files (include key file) into the root of the internal SD, but they are not recognized.
The both firmware write menus remain dark gray.
Probably the sensor matching files must be identified and renamed.
Sorry for my bad English.
Greetings bart.a

bart.a said:
I think I have the camera firmware files found.
The files are probably stored in:
/system/vendor/firmware
or
/vendor/firmware
In Samsung Stock ROM's.
When I copy the files (include key file) into the root of the internal SD, but they are not recognized.
The both firmware write menus remain dark gray.
Probably the sensor matching files must be identified and renamed.
Sorry for my bad English.
Greetings bart.a
Click to expand...
Click to collapse
Great!! I think they are the firmware files too!!
I tried but happens the same, maybe we need other rom or a rooted phone.
Hope someone else try it and works to tell us how to do it.
We are in progress!

In older GALAXY models you had to rename the firmware file accordingly.
Only then they were recognized by the system.
One must also choose the correct matching built for the sensor.
Greetings bart.a

sefelizrc said:
So why isn't the same?
On the S3 and S5 it was exactly the same and when you added the correct files and you updated it appears the same on Cam ver. Load ver. and Phone ver.
Click to expand...
Click to collapse
Back when these phones were released, you had only cam version and phone version. Which is why we were all on neverending quest to make them same.
Subsequently they have added the load section which compares cam firmware, phone firmware (which is deposited by latest system firmware update) and decides to use latest one.
I guess they did not want users flashing different camera firmwares, from different modules, so they beefed up security on later models, as well removed the need for it, in one fell swoop.
Which is why I said for the past few years in my previous comment.
Sent from my SM-G935W8 using XDA-Developers mobile app

A track can be :
http://forum.xda-developers.com/galaxy-s5/help/camera-firmware-thread-t2832384

It works the same way that in S5 or S6 if I rename them but when I push the update option after 2 minutes updating it still the same.
I think I don't have the correct files..

Same Problem here, but how did you unlock Default FW Write etc.?
They are greyed out (S6 Edge) and if i use the apk´s from MrFhenix the Camera Test wont work at all.
Could maybe someone Save his apk´s - i think it´s because of incompatibility of Kitkat and MM (i´m on 6.0.1)

M4ster_3 said:
Same Problem here, but how did you unlock Default FW Write etc.?
They are greyed out (S6 Edge) and if i use the apk´s from MrFhenix the Camera Test wont work at all.
Could maybe someone Save his apk´s - i think it´s because of incompatibility of Kitkat and MM (i´m on 6.0.1)
Click to expand...
Click to collapse
You can ungrey it by doing the following
Rename "yoursensor modexxx.bin" to CamFW_Main.bin
Rename "yoursensor modelxxx.bin" to CamFW_Companion.bin

You also have to add an empty file called 1q2w3e4r.key
You can create it with a pc, just create a text file name it like that and add .key to the name, it doesnt need to have anything inside.

Official Call Recorder For Samsung A30 & Other Samsung Devices Without Root.

This is the guide for those samsung phones without an official call recording inbuilt.
Summary:
Its simply a CSC feature. If your phone is originally from another country than India, you may not have an inbuilt call recording.
Samsung has disabled call recording function for most countries. But if you have device from one of the following countries, it should have call recording feature: Thailand (SPay), Vietnam (SPay), India (SPay), Israel, Algeria, Bangladesh, Libya, Egypt, Laos, Nepal, Sri Lanka and Tunis. If you'd like to change region, you need to change CSC code of your device.
I tried various call recording app but it all failed and its a hectic process without root. And if i root then it will trip knox and no futher official updates that i can install from the phone.
So the basic is to find the latest above mentioned country specific firmware of the device model and flash it.
Yes you can simply flash the CSC file only but just to be in safe side, i recommend you to flash the whole firmware and factory reset.
Warning:
1: Yes, the device will factory reset if you flash 4 firmware file from updato or sammobile or from anywhere else. So be aware.
2: It will also get FRP lock after the flash. So do signout all of your google and samsung accounts/ or remember them properly .
3: Please flash the latest release of the firmware. The device will not let you flash anything older and there will surely be an error while flashing.
4: Use the latest version of odin which is 3.14.1
I tried this on my A305f which was originally from Dubai. But currently im in Nepal and the phone had no call recording option. Flashed with latest Indian Firmware and inserted both sim. I got what i wanted.
Link to A305f Indian Firmware (Updato)
Google Drive Link (uploading Soon)
Screenshots:
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

everyonesweird said:
This is the guide for those samsung phones without an official call recording inbuilt.
Summary:
Its simply a CSC feature. If your phone is originally from another country than India, you may not have an inbuilt call recording.
I tried various app but it all failed and its a hectic process without root. And if i root then it will trip knox and no futher official updates that i can install from the phone.
So the basic is to find the latest Indian firmware of the device model and flash it.
Yes you can simply flash the CSC file only but just to be in safe side, i recommend you to flash the whole firmware and factory reset.
Warning:
1: Yes, the device will factory reset if you flash 4 firmware file from updato or sammobile or from anywhere else. So be aware.
2: It will also get FRP lock after the flash. So do signout all of your google and samsung accounts/ or remember them properly .
3: Please flash the latest release of the firmware. The device will not let you flash anything older and there will surely be an error while flashing.
4: Use the latest version of odin which is 3.14.1
I tried this on my A305f which was originally from Dubai. But currently im in Nepal and the phone had no call recording option. Flashed with latest Indian Firmware and inserted both sim. I got what i wanted.
Link to A305f Indian Firmware (Updato)
Google Drive Link (uploading Soon)
Screenshots:
View attachment 4929207 View attachment 4929209 View attachment 4929211 View attachment 4929213 View attachment 4929215 View attachment 4929217
Click to expand...
Click to collapse
Flashing only the CSC file could cause a bootloop, a soft brick or a network problem?
Flashing a stock CSC file dont trigger the knox counter, right?

Will this work in Android 10 Nigeria?
Will this work in android 10 Nigerian version, I need that call Recorder badly

please someone share android10 csc from indian rom.
I dont want to download whole the indian rom.

Is this safe for Samsunga30
If i flashe on it.

Best Root app for call recording?
I have rooted with magisk. Which app works well with a30?

Any solution for pakistan i have A30s that is nor working woth third party app nither have built in call recording. Please help and resolve my problem.

Shihabus Sakib Rad said:
I have rooted with magisk. Which app works well with a30?
Click to expand...
Click to collapse
Download Axet Call recorder from here.
then, Install Axet Call recorder magisk module and enable call recording in the app (Don't change recording source)

Great

How To Guide Check Region Unlock!! P11 [TB-J606F/L/N]

This method was shared by Koreans at the Ppomppu Forum.
When Check Region Unlock is performed, firmware downgrade and update are free.
Chinese ROM ZUI(12.6) check region introduce
Global ROM 210805 check region introduce
How To Guide (Check Region Unlock) :
https://www.ppomppu.co.kr/zboard/view.php?id=androidtab&no=182485
Questions and answers :
https://www.ppomppu.co.kr/zboard/view.php?id=androidtab&no=182591
Firmware :
https://mirrors.lolinet.com/firmware/lenovo/Tab_P11/TB-J606F/
There are two ways.
1. NV_items_reader_writer
2. Qfil
I recommend using a NV_items_reader_writer.
If the reader fails, you can try again with Qfil.
Android 11 China ROM P11 Global ROM can be updated after May.
China ROM ZUI(12.6) → Global ROM(210805 ~ 210923~)
Global ROM(210520) → Global ROM(210805 ~ 210923~)
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
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"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Error Log analysis :
https://www.ppomppu.co.kr/zboard/view.php?id=androidtab&no=182492
Region (NV_FACRORY_DATA_1_I (3)) :
NV item : 2497 (88 00 01 00 C1 09)
CNXX = 43 4E 58 58
KRXX = 4B 52 58 58
Check Region (NV_OEM_ITEM_6_I (0)) :
NV item : 6858 (88 00 01 00 CA 1A)
UnLock = 00
ChinaLock = 01
GlobalLock = 02

Great! I just learnt:
18. After that, you can update it via OTA or upload it directly to the global September ROM via QFIL!
Thank you so much!

asukav said:
Great! I just learnt:
18. After that, you can update it via OTA or upload it directly to the global September ROM via QFIL!
Thank you so much!
Click to expand...
Click to collapse
how to do that , i dont understand the post

famicom9x said:
how to do that , i dont understand the post
Click to expand...
Click to collapse
Just google translate the ppompu post but the gist of it is our tablet has 2 region codes. One is the one we can view and change using the dialer method. The other is an internal region code which is now being used by the firmware to check after the update to see if the hw matches the software region. This internal code camt be viewed or changed by the dialer method and has to be edited manually.

gqbigpaps said:
Just google translate the ppompu post but the gist of it is our tablet has 2 region codes. One is the one we can view and change using the dialer method. The other is an internal region code which is now being used by the firmware to check after the update to see if the hw matches the software region. This internal code camt be viewed or changed by the dialer method and has to be edited manually.
Click to expand...
Click to collapse
im stuck with the first step, my tablet screen show ffbm mode, but i cannot connect with nv items readter writers , always faled... unable to open com9 port, btw i suceeded in method 2 though

famicom9x said:
im stuck with the first step, my tablet screen show ffbm mode, but i cannot connect with nv items readter writers , always faled... unable to open com9 port, btw i suceeded in method 2 though
Click to expand...
Click to collapse
Try it with a qfil.

famicom9x said:
how to do that , i dont understand the post
Click to expand...
Click to collapse
I just finished with the latest ROW rom and it runs perfectly.
You can use chrome to translate the page into English.
Here, I failed modifying the QCN by using NV but succeeded with QFIL, and actually, I think QFIL is as easy as NV.
Just backup the file (export the file to PC), modify it (change "01" to "02"), and then restore it (import to tablet).
As the post said, your tablet must be the version 0520.

asukav said:
I just finished with the latest ROW rom and it runs perfectly.
You can use chrome to translate the page into English.
Here, I failed modifying the QCN by using NV but succeeded with QFIL, and actually, I think QFIL is as easy as NV.
Just backup the file (export the file to PC), modify it (change "01" to "02"), and then restore it (import to tablet).
As the post said, your tablet must be the version 0520.
Click to expand...
Click to collapse
Chinese Rom version is also available.
change it to 0 instead of 2

qwer1335 said:
Chinese Rom version is also available.
change it to 0 instead of 2
Click to expand...
Click to collapse
Thx！
It's said ZUI 13 is about to come. But, ROW is to my taste. One of the reasons is ZUI 12 doesn't support workprofile (can't use island).
I'm now wondering if there's any possibility to install two systems on one android device.(LOL)

Just an fyi the "internal region code" seems to be of something that was introduced soemtime between 2021 march - sept.
I have 4 p11 2 of which was manufactured in march and the other 2 in sept.
The march models had global roms installed as soon as I unboxed em. Ota upfates wprking flawlessly since.
Spet models on the other hand had so many porblems after instslling global roms until i did the internal region code change.

gqbigpaps said:
Just an fyi the "internal region code" seems to be of something that was introduced soemtime between 2021 march - sept.
I have 4 p11 2 of which was manufactured in march and the other 2 in sept.
The march models had global roms installed as soon as I unboxed em. Ota upfates wprking flawlessly since.
Spet models on the other hand had so many porblems after instslling global roms until i did the internal region code change.
Click to expand...
Click to collapse
With the introduction of the check region, it became annoying.
Chinese ROM ZUI(12.6) check region introduce
Global ROM 210805 check region introduce

My device is pad pro 2020: ZUI 12.6, how do i do this?

congtai07 said:
My device is pad pro 2020: ZUI 12.6, how do i do this?
Click to expand...
Click to collapse
I don't know.

Where in the file 00000000.qcn contains the serial number of the device? Is it possible to restore the serial number such as on the tablet case, if in bootloader mode the serial number looks like this: 012345678ABCDEF?
Or is the number not in this file?
And how can it be restored?
The device is not booting right now.
Thanks!

I was successful. Thank you so much for the post <3

Hi guys i'm stuck in boot loader. How do I get my USB into Diagnostic mode? Can it be done without root?

hungali33 said:
I was successful. Thank you so much for the post <3
Click to expand...
Click to collapse
Can you guide me, pls! . Im stucking at the first step. My PC not appear " Qualcomm HS-USB Android DIAG 901D" while the tablet in FFBM mode. I have installed Qualcomm USB driver.

mardon85 said:
Root no needed, this is "hardware" feature.
Click to expand...
Click to collapse
kaioo3 said:
What you see in Device Manager in point Ports ?
Click to expand...
Click to collapse

I don't see anything appear in Device Manager while "FFBM" start. If I only volume "+" and connect the usb cable, I see " Qualcomm HS-USB QDLoader 9008 (COM5) appear in Device Manager. Is that wrong installed driver?

kaioo3 said:
Is that wrong installed driver?
Click to expand...
Click to collapse
Maybe. Are you don't hear any sound connected device? Try another USB port, try another Qualcomm driver

How To Guide CSC change on Watch 4 Bluetooth 100% Samsung Pay Working

****Disclaimer : I am not responsible for any data loss or damage of the device.
Hi All,
I know everyone is frustrated that we are not able to change the CSC on Watch 4 Bluetooth version. I was keep on trying different methods and atlast i am able to change the CSC on my Watch 4 Bluetooth Model SM-R870. The funny thing is I tried all hard way and nothing succeeded. Finally find out a simple way to change the CSC.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
1. Open the Samsung phone Dialer app on watch
2. Dial *#272*719434266344#
3. Accept the warning Menu
4. Change the CSC to MEA or SPAY supported Region (Its a one time change, be careful, you cant revert back to any other CSC)
5. Install and reboot
6. Select United Arab Emirates and reboot.
5. Done , Watch will be reset and Spay will be available once after pairing again with phone.
Please feel to thank me if its working.
Thanks,
TechDocAsia

Why have you spammed with essentially the same info on the same topic 3 times?

This is my result...
SM-R860
Firmware Version:
FVD4 crap
Seems not working for me...
Will test later again if maybe my fault...
Best Regards

73sydney said:
Why have you spammed with essentially the same info on the same topic 3 times?
View attachment 5628215this is the only thread i created, I have replied on other threads. Check the owner for other threads.
Click to expand...
Click to collapse

adfree said:
This is my result...
SM-R860
Firmware Version:
FVD4 crap
Seems not working for me...
Will test later again if maybe my fault...
Best Regards
Click to expand...
Click to collapse
also on my r870 it does not work I have the same firmware as you

marco_lu said:
also on my r870 it does not work I have the same firmware as you
Click to expand...
Click to collapse
What's your csc version?? Mine was R870OXM1FCV8(multiple csc version)

FVC8 is older as FVD4...
Maybe user with FVC8 can confirm working or not...
According to Google search this Code is since Tizen...
Best Regards

adfree said:
FVC8 is older as FVD4...
Maybe user with FVC8 can confirm working or not...
According to Google search this Code is since Tizen...
Best Regards
Click to expand...
Click to collapse
it doesn't work on EVA8 firmware either

ansaziz777 said:
****Disclaimer : I am not responsible for any data loss or damage of the device.
Hi All,
I know everyone is frustrated that we are not able to change the CSC on Watch 4 Bluetooth version. I was keep on trying different methods and atlast i am able to change the CSC on my Watch 4 Bluetooth Model SM-R870. The funny thing is I tried all hard way and nothing succeeded. Finally find out a simple way to change the CSC.
View attachment 5627771
1. Open the Samsung phone Dialer app on watch
2. Dial *#272*719434266344#
3. Accept the warning Menu
4. Change the CSC to MEA or SPAY supported Region (Its a one time change, be careful, you cant revert back to any other CSC)
5. Install and reboot
6. Select United Arab Emirates and reboot.
5. Done , Watch will be reset and Spay will be available once after pairing again with phone.
Please feel to thank me if its working.
Thanks,
TechDocAsia
Click to expand...
Click to collapse
One more warning
No s/w OTA updates after change of csc. You would remain on present version. No upgrades

Didn't work for me samsung galaxy watch 4 classic model SM-R890.

Highly recommend you do NOT do this

ansaziz777 said:
****Disclaimer : I am not responsible for any data loss or damage of the device.
Hi All,
I know everyone is frustrated that we are not able to change the CSC on Watch 4 Bluetooth version. I was keep on trying different methods and atlast i am able to change the CSC on my Watch 4 Bluetooth Model SM-R870. The funny thing is I tried all hard way and nothing succeeded. Finally find out a simple way to change the CSC.
View attachment 5627771
1. Open the Samsung phone Dialer app on watch
2. Dial *#272*719434266344#
3. Accept the warning Menu
4. Change the CSC to MEA or SPAY supported Region (Its a one time change, be careful, you cant revert back to any other CSC)
5. Install and reboot
6. Select United Arab Emirates and reboot.
5. Done , Watch will be reset and Spay will be available once after pairing again with phone.
Please feel to thank me if its working.
Thanks,
TechDocAsia
Click to expand...
Click to collapse
Bluetooth version GW don’t work this way to change CSC. The process is through Odin wifi and adb steps. Still no luck for me. Anyone changed successfully please share the process. Thanks in advance.

Tested self on SM-R870 with EVA8...
NO. Not working.
Best Regards

Can confirm that it worked for me and even updates are intact.
Video confirmation of Spay and Updates

ansaziz777 said:
****Disclaimer : I am not responsible for any data loss or damage of the device.
Hi All,
I know everyone is frustrated that we are not able to change the CSC on Watch 4 Bluetooth version. I was keep on trying different methods and atlast i am able to change the CSC on my Watch 4 Bluetooth Model SM-R870. The funny thing is I tried all hard way and nothing succeeded. Finally find out a simple way to change the CSC.
View attachment 5627771
1. Open the Samsung phone Dialer app on watch
2. Dial *#272*719434266344#
3. Accept the warning Menu
4. Change the CSC to MEA or SPAY supported Region (Its a one time change, be careful, you cant revert back to any other CSC)
5. Install and reboot
6. Select United Arab Emirates and reboot.
5. Done , Watch will be reset and Spay will be available once after pairing again with phone.
Please feel to thank me if its working.
Thanks,
TechDocAsia
Click to expand...
Click to collapse
Confirmed working like a charm and also got an update after changing csc. So update is also working..Also managed to add indian cards… Thanks a lot for sharing this

Maybe share old CSC...
For instance *#0808# Code is blocked for DBT...
But working for BTU and XAA confirmed...
Best Regards

Murali_ch21 said:
Bluetooth version GW don’t work this way to change CSC. The process is through Odin wifi and adb steps. Still no luck for me. Anyone changed successfully please share the process. Thanks in advance.
Click to expand...
Click to collapse
Check the video shared by @RajGopi

adfree said:
Tested self on SM-R870 with EVA8...
NO. Not working.
Best Regards
Click to expand...
Click to collapse
Is it OXM version??
Maybe this code is blocked on other firmwares.

ansaziz777 said:
Check the video shared by @RajGopi
Click to expand...
Click to collapse
Thanks for the update friend. My model is SM-R860 from Korea. Bluetooth version. Tried again but still it doesn't work.

If maybe this work on Device for India...
So IMHO INU is CSC
Example...
http://fota-cloud-dn.ospserver.net/firmware/INU/SM-R860/version.xml
OXM is NO active CSC...
I will try to investigate why Code *#0808# is blocked by active CSC DBT...
Maybe similar magic to your Code...
Best Regards