@prmah : Firstly, thanks for the link.
I managed to connect my Gear S3 with TizenStudio and configure CSC on it.
I changed the CSC to INU (this was the only code seen for India) and the watch was reset and the backup was restored.
But when I try to launch SPay through my phone, I get this message :
"Unable to continue using Samsung Pay. Your gear may not be supported.
If this does not apply to you, then send us an inquiry with more info about your problem."
Where have I gone wrong? Any solutions to get SPay to work?
TIA,
-benki