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Changing the Region on the galaxy active 2 including R830XXU1BSI9 update

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tb_

Senior Member
Jun 6, 2008
99
51
Most old methods of changing the region on the samsung watches don't work anymore. Given their return policy I thought I bought expensive junk.

starts the csc selection but doesn't actually change the region.

TL;DR you need to install the combination firmware and edit two files

INFO: Netodin works fine in linux as well with wine since it works over the wifi

1. Start NetOdin3 click options and disable auto reboot
2. Click AP and select the combination firmware
3. Hold reboot button on the Samsung watch, when the reboot screen shows up press home multiple times to get into the boot menu
4. Jump to the Download (Wireless) and hold the boot button again to get into the Firmware download menu
5. Press the same button to more times to switch the watch to AP mode
6. Connect your wifi to the watch SM-R830-someid
7. In NetOdin3 press Start to flash the combination firmware
8. Click reset and now press CSC button
9. Select the CSC md5 and press start
10. When you reboot the device hold the boot button again until you enter the boot menu again
11. Select recovery and let the device restart
12. Enter settings -> About watch -> Software -> Tap software version until debug mode starts (you may need to restart your watch)
13. Connect watch to wifi
14. sdb connect <watchip>
15. sdb root on
16. sdb shell
17. backup active-customer.info: sdb pull /csa/csc/csc-active-customer.inf
18. backup prodcode.dat: sdb pull /csa/imei/prodcode.dat
19. edit /csa/csc/csc-active-customer.inf and replace csc code (I used vim and the XAR for the US version, https://www.geeksforgeeks.org/vi-editor-unix/ )
20. edit /csa/imei/prodcode.dat and replace last three characters to csc code you want (don't enter the csc selection after this it will reset it to the factory region)
21. reboot the device into recovery (i used /usr/bin/csc-util --reboot customer_change but i'm not sure it's necessary)
22. run netodin again and select AP, BL and CSC to flash stock
23. enjoy samsung pay if you have a US credit card (seems like you no longer need to install samsung pay apks on non samsung phone it's part of the wearables app)

R830 combination firmware

https://www.file-upload.net/download-13751174/combination-R830XXU1ASI2.7z.html

R830 3 file firmware

https://www.file-upload.net/download-13751206/multi-3file-R830XXU1BSI9.7z.html

sha256 checksums:

e719a024540706c07ae956c2a737b43dcaefa2b3335b1118121b6ca8168089ab AP_R830XXU1BSI9_usr.tar.md5
d0be4fdd7f5abaa6a4520f487b85dec14f94dd9d14a239fde69f5281817f7d99 BL_R830XXU1BSI9_usr.tar.md5
8f28bee9aa56b5c8d2fb8fa7bf16ab5cf0c3bff5fc547e2ada18a90c161f61e5 COMBINATION-FT40_R830XXU1ASI2.tar.md5
efe5e799c95c70aa1de8cced5a544bc471b2b74f61a3babffa72a7e295804225 CSC_OXA_R830OXA1BSI9_usr.tar.md5

Thanks to @adfree for the links and purcival for the order of how to flash the combination firmware and stock after

[0] Netodin
[1] how to change region on samsung gear s3
[2] combination firmware for sm-r820 by @adfree
[3] sdb in tizen studio CLI tools section
 
Last edited:

dodo1515

Senior Member
Oct 22, 2013
200
33
Curepipe
Hi,
Can l use this method just for updating the firmware of my watch?l'm still on R830XXU1ASHF.. if yes should l follow all these steps??
Thanks
 

tareqsy91

Member
Oct 12, 2019
22
4
A Beginner

Hi,


First of all I want to thank you guys for the grat work.
I want to say that I am actually a beginner or amature when it comes to what you are doing
The instructions are very clea. But I would really appreciate it if anybody describes what to do with more details, especially the codes of sdb. Just some more details
It would be great if you can upload a video "If possible" :D

1. What is the worst thing that might happen if I do something wrong? Can the watch be ruind? Can I fix it if it happens?
2. Where can I find the csc of my country "Sweden" I googled it and found like 5 or 6 different csc !! Is there any trusted source?
3. Is it appliable to R820??? the 44mm model? or do I need to do something different in my case??

Thanks in advance
 

2avrmillion

New member
Oct 11, 2019
4
3
Coming from the other thread to confirm this worked for me, thanks a ton! Didn't think it would be that simple with just editing two text files.. lol

For those who missed it(I did), some steps are missing where one has to repeatedly connect back to AP every time something has to be done in NetOdin.
Also if anyone is confused about the steps, it's pretty much the same process for all samsung watches so just search for it on youtube, it's there.

Out of curiosity, where did you get the firmware from?? @tb_
 

dodo1515

Senior Member
Oct 22, 2013
200
33
Curepipe
Coming from the other thread to confirm this worked for me, thanks a ton! Didn't think it would be that simple with just editing two text files.. lol

For those who missed it(I did), some steps are missing where one has to repeatedly connect back to AP every time something has to be done in NetOdin.
Also if anyone is confused about the steps, it's pretty much the same process for all samsung watches so just search for it on youtube, it's there.

Out of curiosity, where did you get the firmware from?? @tb_

Hi ,
Thanks for your feedback,are the sdb thing code mandatory?on youtube they only add the 3 or 4 files on odin and just flash it...
 
Last edited:

Highpryority

New member
Apr 29, 2019
3
1
Hey guys, firstly thankyou! This worked perfectly and now I'm able to use Samsung pay down in Australia! Only thing that I would add from the perspective of being a complete beginner to Odin, is how to save the files when you edit the CSC (press escape then type ":wq") it took me an extra 20 minutes to figure it out and I thought someone might find it useful :)
 
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tb_

Senior Member
Jun 6, 2008
99
51
Out of curiosity, where did you get the firmware from?? @tb_

Got it from a third party. I was worried that it was counterfeit so before installing it I went through the system files to see if it's really the right model. But I can of course not guarantee that it wasn't modified by a third party. But I kinda assume that samsung won't boot from any random image given that you can't downgrade Samsung and even their tizen to any version you want apparently.

Thank you for your reply,l bought my watch in UK.
According to the list the csc is BTU-UNITED KINGDOM.

{tizen} % cat preconfig/BTU/preset/csc-preset.ini
[default]
keyboard_lang="en_GB"
keyboard_preinstalled_lang="1^en_GB#en_US#de_DE#fr_FR#it_IT#pl_PL^en_GB

The csc.img has BTU inside. But I can't guarantee you anything when I ran this with my zone set to XTC it was booting fine but I couldn't get my phone to connect / initialize the watch after the factory reset. But not sure if it was the app or because i didn't properly reset or if I maybe shouldn't have reset.

So I can tell you that it will boot without issues but whether it works no idea. Maybe someone else can comment on that.
 
Last edited:
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tareqsy91

Member
Oct 12, 2019
22
4
Hey guys, firstly thankyou! This worked perfectly and now I'm able to use Samsung pay down in Australia! Only thing that I would add from the perspective of being a complete beginner to Odin, is how to save the files when you edit the CSC (press escape then type ":wq") it took me an extra 20 minutes to figure it out and I thought someone might find it useful :)

I think you are talking about steps 17 and 18. If so can you please till me a bit more detailed how to do these steps ! I mean Do we edit manually in the sdb?? or how are we editing? Why do we need to save the files after editing? there is nothing about saving files in the steps above!

Sorry if my questions are silly but I am a real beginner here!
 

tb_

Senior Member
Jun 6, 2008
99
51
1. What is the worst thing that might happen if I do something wrong? Can the watch be ruind? Can I fix it if it happens?

No one will give you guarantees on this because no one wants to blame if something goes wrong. But if you try absolutely under no circumstances interrupt the flashing process and absolutely don't use the wrong model ROM. Also to be safe don't try to flash a firmware that has a lower version than your current one.

2. Where can I find the csc of my country "Sweden" I googled it and found like 5 or 6 different csc !! Is there any trusted source?

csc usually depends on the vendor. So there are a bunch of sweden csc's . But you should be able to find your current csc in /cas/imei/prodcode.dat

a list is on droid views

3. Is it appliable to R820??? the 44mm model? or do I need to do something different in my case??

r820 is the 44mm bluetooth model.

825 and 835 are lte with one version being US and the other being global I believe.
 
Last edited:

tareqsy91

Member
Oct 12, 2019
22
4
No one will give you guarantees on this because no one wants to blame if something goes wrong. But if you try absolutely under no circumstances interrupt the flashing process and absolutely don't use the wrong model ROM. Also to be safe don't try to flash a firmware that has a lower version than your current one.

r820 is the 44mm bluetooth model.

825 and 835 are lte with one version being US and the other being global I believe.


Lower frimware? I have Tizen version 4.0.0.7
1. Do you know if the availabe combination frimware for R820 is of a lower frimware??
2. Yes My R820 is the 44mm bluetooth. thats correct. I guess I should use R820 which you linked in your original post!
3. Can you please describe more about steps 17-18 I didn't really understand how to edit! It's my first time using this sdb thing :(


Thanks for your patience everybody answering or even reading my questions
 

tareqsy91

Member
Oct 12, 2019
22
4
I think I am the most commenting member on this topic.

I have read a lot and almost all the details in each shared link in this thread.
I am trying hard I swear. Lately after downloading the shared files in the links in the original post. I can't start the file "web-cli_Tizen_Studio_3.3_windows-64"
It is just flashing a cmd window and nothing happens after that!
What should I do in this case??

The other file in the link "web-ide_Tizen_Studio_3.3_windows-64" is telling I should have JDK software which I installed but It didn't help anyway!
 

shinzomask

Member
May 1, 2013
23
13
I think I am the most commenting member on this topic.

I have read a lot and almost all the details in each shared link in this thread.
I am trying hard I swear. Lately after downloading the shared files in the links in the original post. I can't start the file "web-cli_Tizen_Studio_3.3_windows-64"
It is just flashing a cmd window and nothing happens after that!
What should I do in this case??

The other file in the link "web-ide_Tizen_Studio_3.3_windows-64" is telling I should have JDK software which I installed but It didn't help anyway!

Don't use that because I had the same issue in Windows 10. Go to https://forum.xda-developers.com/showpost.php?p=74585286&postcount=330 and download SDBstarterKidv1.zip. Extract it and run ansicon.exe under data/tools folder. It will open a command prompt.
 
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tareqsy91

Member
Oct 12, 2019
22
4
Don't use that because I had the same issue in Windows 10. Go to https://forum.xda-developers.com/showpost.php?p=74585286&postcount=330 and download SDBstarterKidv1.zip. Extract it and run ansicon.exe under data/tools folder. It will open a command prompt.

Thanks for the advice
I haven't done Netodin steps yet.
I am trying now to just connect the watch to the computer through the wifi network.
I have debugging mode on in the watch but I still can not connect to the watch
It keeps telling me failed to connect

connecting to 192.168.0.16:26101 ...
failed to connect to 192.168.0.16:26101


Is it normal I can't connect before doing the netodin steps??
 

shinzomask

Member
May 1, 2013
23
13
Thanks for the advice
I haven't done Netodin steps yet.
I am trying now to just connect the watch to the computer through the wifi network.
I have debugging mode on in the watch but I still can not connect to the watch
It keeps telling me failed to connect

connecting to 192.168.0.16:26101 ...
failed to connect to 192.168.0.16:26101


Is it normal I can't connect before doing the netodin steps??

Normally the watch comes up with a prompt to allow your pc to connect to your watch. Maybe you might have to restart your watch. I would try the netodin step first because it might be more straightforward to connect the combination firmware to the computer because I didn't get any prompt on that.

Also maybe check that your virus scanner/firewall isn't blocking access.
 
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tareqsy91

Member
Oct 12, 2019
22
4
Normally the watch comes up with a prompt to allow your pc to connect to your watch. Maybe you might have to restart your watch. I would try the netodin step first because it might be more straightforward to connect the combination firmware to the computer because I didn't get any prompt on that.

Also maybe check that your virus scanner/firewall isn't blocking access.


I've tried to turn off my antivirus and firewall but still no connection.
The newer versions of sdb 4.1.8 is showing the following:

The version of SDB client (4.1.8) and server (2.2.60) are different.
This may cause version compatibility problems.
It is recommended to use SDB server 4.1.8. *
 

adfree

Senior Member
Jun 14, 2008
9,388
5,559
Samsung Galaxy Watch 4
I've tried to turn off my antivirus and firewall but still no connection.
The newer versions of sdb 4.1.8 is showing the following:

The version of SDB client (4.1.8) and server (2.2.60) are different.
This may cause version compatibility problems.
It is recommended to use SDB server 4.1.8. *

1.
sdb.exe once started is Background process...
To close active sdb you can do this:
Code:
sdb kill-server

2.
https://forum.xda-developers.com/showpost.php?p=74585286&postcount=330

Look into this old post...

Try to read:
Code:
Guidelines_on_Connecting_GearS2_device_using_WiFi.pdf
Guidelines_on_Connecting_GearS2_device_using_WiFi_151222.pdf

Ignore Gear S2 text... because this is same shhh... since years...

Mandatory is to find your correct IP. :D ;)

Hint...
Maybe it helps to try different PCs or Notebooks... sometimes more luck on other device... but only with correct IP in Command...

connecting to 192.168.0.16:26101 ...
failed to connect to 192.168.0.16:26101

If these digits are correct...
Command Line looks like this:

Code:
sdb connect 192.168.0.16

Not more not less... NO need to add something behind...

Best Regards
 

tareqsy91

Member
Oct 12, 2019
22
4
This is driving me crazy guys
Still cannot connect to the watch through wifi yet

I am getting this answer now

* server not running. starting it now on port 26099 *
* server started successfully *
connecting to 192.168.0.16:26101 ...
failed to connect to 192.168.0.16:26101

I am trying on both the older and the newer versions of sdb
Debugging mode is on in my watch

When writing same command again "sdb connect 192.168.0.16" I get weird figures or "error: target offline" in the newest version of sdb

I have even tried to create a private wifi from the computer I use and connect the watch to the same network but it didn't help either.
I am still only trying to connect the watch to the computer through sdb. I haven't done the odin steps yet. I am afraid doing odin steps and not being able to complete the sdb connecty steps !!



I have another question:
Where I live in Sweden. Samsung didn't release a bluetooth version at all. That's why I bought mine from Germany.
If I change my csc to Sweden. Will it work as there is actually no swedish bluetooth SM-R820 !! I mean that mine watch will be probably the only bluetooth r820 with swedish csc !!!! will I get updates as usual? will the watch even work?
 

adfree

Senior Member
Jun 14, 2008
9,388
5,559
Samsung Galaxy Watch 4
@tareqsy91

1.
You have nobody who can help you?
No family... no friends nor neighbar with second/other PC... Notebook?


I am using different PCs with:
Win XP
Win 7
Win 8
Win 8.1


Never tried with sh .tty Win 10...

1.1
Maybe give infos what you use... Windows Version AND 32 bit or 64 bit
:confused:


2.
Sweden or Germany...

No matter...

F. device work with byteexact Values... Sales Code aka CSC...

2.
Their are few other methods to READ EXACT infos from device... instead talking about blabla Sweden or Germany...

Look at this post... with screenshots...

App which can read these 2 files from Watch:
https://forum.xda-developers.com/showpost.php?p=80072694&postcount=786

Code:
com.somyac.gear.transfer.lite

Best Regards
 
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  • 1
    Yes.

    This method offers you a QR code reader during the LTE activation process.
    There you can scan your provider's QR code and then your watch will use that provider's network.

    You might need to finetune APN settings on the watch to have working data connection. Usually this is not needed though.

    Changing CSC is totally out of scope for Samsung Stores. It (can) voids the warranty if you don't take care.

    However, based on my experience, you don't need to change the CSC in order to activate the LTE. (CSC changing mainly helps you getting officially unsupported features on your watch, like SPAY, BloodPressure or ECG).
    1
    I report back. the activation of lte worked perfectly with danegro's method, including data connection
    watch now works on romanian orange provider with csc from uk by scanning the esim qr code
  • 13
    Most old methods of changing the region on the samsung watches don't work anymore. Given their return policy I thought I bought expensive junk.

    starts the csc selection but doesn't actually change the region.

    TL;DR you need to install the combination firmware and edit two files

    INFO: Netodin works fine in linux as well with wine since it works over the wifi

    1. Start NetOdin3 click options and disable auto reboot
    2. Click AP and select the combination firmware
    3. Hold reboot button on the Samsung watch, when the reboot screen shows up press home multiple times to get into the boot menu
    4. Jump to the Download (Wireless) and hold the boot button again to get into the Firmware download menu
    5. Press the same button to more times to switch the watch to AP mode
    6. Connect your wifi to the watch SM-R830-someid
    7. In NetOdin3 press Start to flash the combination firmware
    8. Click reset and now press CSC button
    9. Select the CSC md5 and press start
    10. When you reboot the device hold the boot button again until you enter the boot menu again
    11. Select recovery and let the device restart
    12. Enter settings -> About watch -> Software -> Tap software version until debug mode starts (you may need to restart your watch)
    13. Connect watch to wifi
    14. sdb connect <watchip>
    15. sdb root on
    16. sdb shell
    17. backup active-customer.info: sdb pull /csa/csc/csc-active-customer.inf
    18. backup prodcode.dat: sdb pull /csa/imei/prodcode.dat
    19. edit /csa/csc/csc-active-customer.inf and replace csc code (I used vim and the XAR for the US version, https://www.geeksforgeeks.org/vi-editor-unix/ )
    20. edit /csa/imei/prodcode.dat and replace last three characters to csc code you want (don't enter the csc selection after this it will reset it to the factory region)
    21. reboot the device into recovery (i used /usr/bin/csc-util --reboot customer_change but i'm not sure it's necessary)
    22. run netodin again and select AP, BL and CSC to flash stock
    23. enjoy samsung pay if you have a US credit card (seems like you no longer need to install samsung pay apks on non samsung phone it's part of the wearables app)

    R830 combination firmware

    https://www.file-upload.net/download-13751174/combination-R830XXU1ASI2.7z.html

    R830 3 file firmware

    https://www.file-upload.net/download-13751206/multi-3file-R830XXU1BSI9.7z.html

    sha256 checksums:

    e719a024540706c07ae956c2a737b43dcaefa2b3335b1118121b6ca8168089ab AP_R830XXU1BSI9_usr.tar.md5
    d0be4fdd7f5abaa6a4520f487b85dec14f94dd9d14a239fde69f5281817f7d99 BL_R830XXU1BSI9_usr.tar.md5
    8f28bee9aa56b5c8d2fb8fa7bf16ab5cf0c3bff5fc547e2ada18a90c161f61e5 COMBINATION-FT40_R830XXU1ASI2.tar.md5
    efe5e799c95c70aa1de8cced5a544bc471b2b74f61a3babffa72a7e295804225 CSC_OXA_R830OXA1BSI9_usr.tar.md5

    Thanks to @adfree for the links and purcival for the order of how to flash the combination firmware and stock after

    [0] Netodin
    [1] how to change region on samsung gear s3
    [2] combination firmware for sm-r820 by @adfree
    [3] sdb in tizen studio CLI tools section
    7
    After reading all of this thread and running through the procedure several times before being successful I have tried to build further (more details) on the posts so far made by others...

    The procedure below is known to have worked for at least several people (including me) if your Samsung Galaxy Watch Active2 (SM-R820) has Tizen version 4.0.0.6. It worked for me changing from French CRC (XER) to UK CRC (BTU) on Tizen 4.0.0.6. After I followed the procedure below my watch started up in English (not French as it did out of the box) and then a few minutes later asked me to let it update itself to Tizen 4.0.0.7. All seems to be working perfectly.

    If you have Tizen 4.0.0.7 please check this thread (e.g. post #76) for further info.

    NOTE: The Links in this post are for SM-R820, DO NOT USE THE FIRMWARE FILES IN THIS POST FOR ANY OTHER VERSION

    Note: To check what CRC you need, see on site Droid Views "how-to-change-csc-in-samsung-galaxy-phones"

    Note: I used this procedure because I live in the UK and I wanted the Silver (shiny) Stainless Steel version of the watch, but Samsung UK have only released Gold and Black! Note Samsung UK, your colour choices are very poor! Samsung make the range of colours because that is what people want, choices. OK, sorry folks, unhappy customer rant over, back to why I needed to use this procedure...
    So I bought on Amazon a French version of the watch (Samsung France have released all colour variants from what I can see). When I received my watch (as new from Amazon) I turned it on, changed the language to english, ran through the watch process to set it up (connected to Samsung Wear app on my phone etc). However, I did not allow the watch to update itself. It told me there was a software update, but I did not install it. Once the watch had finished setting itself up and I was happy it seemed to be working properly and wasn't faulty, then I then tried to setup Samsung Pay. This is where like everyone else I found I couldn't register my UK bank cards to the Watches French Samsung Pay service (terms and condition etc are all in French and it rejected my cards). So that is when it was confirmed for me that if I want to use Samsung Pay in the UK with my UK bank cards I needed to change the CRC to the UK one = BTU. So I started the procedure below to change it from French CRC (XER) to English CRC (BTU)...

    Step#0: Charge your watch to >90% charged

    Step#1: Download 'NETODIN' https://forum.xda-developers.com/attachment.php?attachmentid=4382735&d=1515359315

    Step#2 Download SDBStarterKidv1 from https://forum.xda-developers.com/attachment.php?attachmentid=4338152&d=1511255266

    Step#3: For model R820 download Combination Firmware https://forum.xda-developers.com/sho...81&postcount=8

    Step#4 For model R820 download Stock Rom (same link as Step#3) https://forum.xda-developers.com/sho...81&postcount=8

    Step#5: Keep on holding the Home button on the watch till you see Rebooting popup appears

    Step#6: Immediately start pressing the Home button until the recovery option appears

    Step#7: now press Home button again to drop down to "download mode (wireless mode)

    Step#8: now hold the Home button again for some time till the black screen appears

    Step#9: at the download mode screen now again press home button again until connection type changes to AP

    Step#10: check your wireless network in your computer, you will see a new open network will appear showing model number of your watch, connect your system to that network

    Step#11: Now open NETODIN and you will be able to see that NETODIN shows connected

    Step#12a: In NETODIN select options and turn off (untick) AUTOREBOOT.

    Step#12b: Click on AP in NETODIN and select the file from the combination firmware, when NETODIN has finished checking the file, press the start button.

    Step#13a: once you see pass status in NETODIN press the reset button

    Step#13b: In NETODIN select options again and again turn off (untick) AUTOREBOOT

    Step#13c: Select CSC and select the CSC file located in the STOCK ROM file, press start button

    Step#14: once you see pass status in the NETODIN, hold the Home button on your watch until you see rebooting splash and repeat the STEP#6 to access the recovery options menu

    Step#15: go down so "recovery" is selected and then hold down the HOME button until black screen appears

    Step#16: your watch shall start normally and after that go to settings in your watch turn on wifi and connect to your wifi network, just search for IP their and note it down

    Step#17: go to about and software "third item written in blue color of two characters most likely" locate software and continue tapping on that until you see some popup appears

    Step#18: restart your watch (hold home key until it powers off, then hold home key again till it restarts)

    Step#19: open SDBStarterKidv1.zip and extract content. Open the folder data/tools and run ansicon.exe. This will open a CLI = Command Line Interface

    Step#20: Type: sdb connect ***.***.*.***
    ps * indicate your watch ip which you have written in step #16
    you shall see connected to

    Step#21: Type: sdb root on

    Step#22: Type: sdb shell

    Step#23: Type: edit /csa/csc/csc-active-customer.inf
    you will see something written at your screen in this way..

    CSC
    ~
    ~
    ~

    Step#24: press i on your keyboard and replace the three alphabets representing your current CSC to your desired CSC code. If you do not knwo what CRC you need see on site Droid Views "how-to-change-csc-in-samsung-galaxy-phones"

    Step#25: hit escape key

    Step#26: Type: : (yes that is a single colon, no spaces, don't type this text, just the single colon)

    Step#27: Type: wq
    Note: Ignore any error about can't write to a file XXXX where XXXX is not the file we are editing. If you want to check your change was saved you can re open the file and you should see your changes already exist

    Step#28: Type: edit /csa/imei/prodcode.dat

    Step#29: Repeat step# 24,25,26,27
    again ignore any error about writing to another file

    Step#30: repeat step# 5,6,7,8,9,10,11 just don't untick autoreboot this time

    Step#31: select BL,AP and CSC from the stock rom

    Step#32: Delete the galaxy wearable app and plugin and then unpair your watch from the phone

    Step#33: after NETODIN shows pass, your watch should start normally and you should be able to connect your watch to mobile

    all credits and thanks goes to...

    @tb_
    @adfree
    @hashirajaz94
    ps: don't put on charge your device for few minutes due to overheating.

    Hope that helps you RobinGB
    5
    Step # 1: Download 'NETODIN' https://forum.xda-developers.com/attachment.php?attachmentid=4382735&d=1515359315
    Step # 2: Download SDB http://download.tizen.org/sdk/tizenstudio/official/binary/sdb_2.2.89_windows-64.zip
    Step # 3: For Model # R820 download Combination Firmware https://forum.xda-developers.com/showpost.php?p=80340381&postcount=8
    Step # 4 For model R820 download stock rom from link in Step #3
    "Make sure your watch is 90% or above charged"
    Step#5: Keep on holding the Home button on the watch till you see Rebooting popup appears
    Step#6: Immediately start pressing the Home button until the recovery option appears
    Step#7: now press Home button again to drop down to "download mode (wireless mode)
    Step#8: now hold the Home button again for some time till the black screen appears
    Step#9: at the download mode screen now again press home button again until connection type changes to AP
    Step#10: check your wireless network in your computer, you will see a new open network will appear showing model number of your watch, connect your system to that network
    Step#11: Now open NETODIN and you will be able to see that NETODIN shows connected
    Step#12: click on AP in NETODIN and select the file from the combination firmware and make sure you have unticked AUTOREBOOT option before pressing start
    Step#13: once you see pass status in NETODIN press reset, select CSC and select the CSC file located in the STOCK ROM file , also make sure you unchecked autoreboot before starting
    Step#14: once you see pass status in the NETODIN, hold the Home button on your watch until you see rebooting splash and repeat the STEP#6
    Step#15: drag down to recovery and keep on pressing the HOME button until black screen appears
    Step#16: your watch shall start normally and after that go to settings in your watch turn on wifi and connect to your wifi network, just search for IP their and note it down
    Step#17: go to about and software "third item written in blue color of two characters most likely" locate software and continue tapping on that until you see some popup appears
    Step#18: restart your watch
    Step#19: open SDB folder in your computer open data folder and then tools , run ansicon
    Step#20: sdb connect ***.***.*.***
    ps * indicate your watch ip which you have written in step #16
    you shall see connected to
    Step#21: sdb root on
    Step#22: sdb shell
    Step#23: edit /csa/csc/csc-active-customer.inf
    you will see something written at your screen in this way
    csc
    ~
    ~
    ~
    Step#24: press i on your keyboard and replace the three alphabets representing your current csc to your desired csc code
    Step#25: hit escape key
    Step#26: type :
    Step#27: type wq
    Step#28: edit /csa/imei/prodcode.dat
    Step#29: Repeat step# 24,25,26,27
    ignore any error
    Step#30: repeat step# 5,6,7,8,9,10,11 just don't untick autoreboot this time
    Step#31: select BL,AP and CSC from the stock rom
    Step#32: Delete the galaxy wearable app and plugin and then unpair your watch from the phone
    Step#33: after NETODIN shows pass, your watch should start normally and you should be able to connect your watch to mobile

    all credits and thanks goes to
    @adfree
    @tb_

    ps: don't put on charge your device for few minutes due to overheating.
    2
    1. What is the worst thing that might happen if I do something wrong? Can the watch be ruind? Can I fix it if it happens?

    No one will give you guarantees on this because no one wants to blame if something goes wrong. But if you try absolutely under no circumstances interrupt the flashing process and absolutely don't use the wrong model ROM. Also to be safe don't try to flash a firmware that has a lower version than your current one.

    2. Where can I find the csc of my country "Sweden" I googled it and found like 5 or 6 different csc !! Is there any trusted source?

    csc usually depends on the vendor. So there are a bunch of sweden csc's . But you should be able to find your current csc in /cas/imei/prodcode.dat

    a list is on droid views

    3. Is it appliable to R820??? the 44mm model? or do I need to do something different in my case??

    r820 is the 44mm bluetooth model.

    825 and 835 are lte with one version being US and the other being global I believe.
    2
    I'll check this tomorow!

    Ihave all these if you want:
    COMBINATION FT40 R820XXU1ASL2
    COMBINATION FT40 R820XXU1ASK3
    COMBINATION FT40 R820XXU1ASK2
    COMBINATION FT40 R820XXU1ASI2
    COMBINATION FT40 R820XXU1ASI1
    COMBINATION FT40 R820XXU1ASH3
    COMBINATION FT40 R820XXU1ASH2
    R820XXU1BSJ9 Tizen 3File
    R820XXU1BSJ6 Tizen 3File
    R820XXU1BSI9 Tizen 3File
    R820XXU1ASHF Tizen 3File
    R820XXXU1ASHF Tizen 3File

    Best regards