Thanks. I don't care about the Tizen 3.0 update, it was mainly to stop the watch from trying spend 5 minutes activating every time I power it on.Only if you want brick/kill your device, like SM-R765:
https://forum.xda-developers.com/gear-s3/help/please-help-bricked-gear-s3-sm-r765s-t3665558
https://forum.xda-developers.com/gear-s3/help/sm-r765f-teardown-t3659431
Sorry, same sitiuation like SM-R765...
You can sing or hear this nice nice Song "Sit and wait"... during you sit and wait...
If you edit Link... you can check for your device:
https://forum.xda-developers.com/showpost.php?p=74649283&postcount=9
This is at the moment all you can do... without damage your Gear S3...
Best Regards