[Samsung Galaxy Watch] tower5:
Dear Idan73

thanks again

just let me rewrite the entire process to change CSC , I watched again the video and now this is what I understood ( please have a look and tell me if you believe is ok ) :

1. Start NetOdin3 click options and NOT disable auto reboot

2. Click AP and select the combination firmware (COMBINATION-FT55_R820XXU1ATJ1.tar.md5)

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 ; watch becomes an hot spot and I have to connect my PC in wifi to the watch SM-R820-hot spot

6. open wifi NetOdin3 and check connection with watch is ok looking if the ID field becomes Blue with the IP address

7.verify to have Select the AP and load the md5 file =COMBINATION-FT55_R820XXU1ATJ1.tar.md5 ) and press start

8. When you reboot the device let the watch complete the reboot

9. go to set up and connections

10. Connect watch to wifi ( same wifi network as the one of my PC ) and select on the watch "wifi always on"

11. note the IP address of the watch ( e.g. : 192.168.100.122)

12. reboot the watch

13. on the PC , check wifi connection is the same as the watch, open SDB using the qppropriqte version for your PC (e.g.:sdb_2.2.60_windows-64) , unzip ; go to DATA and after to TOOLS , there are 4 files in this directory ; one is "ansicon" , click on it and it will open a DOS command window

14.now we need to connect to the watch . type " sdb connect 192.168.100.122" and verify the connection is established ; if ok proceed with the following commands

15. "sdb root on"

16. verify if the command is confirmed "switched to root account mode"

17. "sdb pull csc-active-customer.inf /csa/csc/"

18. "sdb pull prodcode.dat /csa/imei/"

now 2 files more are in the TOOLS Directory and we need to EDIT one by one these 2 files to change CSC

19. edit /csa/csc/csc-active-customer.inf and replace csc code (I'm actually XAR and I would change to KOO .

20. edit /csa/imei/prodcode.dat and replace last three characters to csc code you want (KOO)

21. "sdb push csc-active-customer.inf /csa/csc/"

22."sdb push prodcode.dat /csa/imei/"

23.reboot the watch and enter the watch in download mode , entering in AP ( hot spot mode , again) , connect the PC to this hot spot

24. run netodin again and select AP, BL and CSC to flash stock , using for AP , BL and CSC these files (stock)

AP_R820XXU1CTJ5_usr.tar.md5

BL_R820XXU1CTJ5_usr.tar.md5

CSC_OXA_R820OXA1CTJ5_usr.tar.md5

now the difficult questions are :

1) could you check if those/ indicated files the right to be used for an R820 , being now in tizen 5.5.0.1 , - firmware R820XXU1CTJ5 ?

2) should I expect , moving to KOO , to get an official update from Samsung , adding BP and ECG without any need to install modded SHM APK on my mobile phone ? ( knowing I can't because my mobile phone is locked by Company/Professional rules and I cannot remove the lock on external APKs = I cannot install any APP at all , only using official automatic upgrades)

3) I know KOO does not allow PAY ( never used until now....so not a great problem) but wich could be the code to use to BRAZILIAN CSC and is it really recommended vs KOO , in view of next possible upgrades that , I suppose , will arrive in KOO before any other Country ?

if you arrived here , you had a lot of patience ....thanks for any comment and contribution

Best Regards