Yesterday when I turned on my RS201, it prompted a message “This device has been registered for use only in Korea” and I could not use it any more. I rebooted the machine a few times but still got the same message. Can anyone help urgently resolve this problem? I bought it in early 2020 and have been using it without any problem for the past few years.
Obviously, one needs to go to Korea 
Where did you buy it?
Rebooting? Or did you mean a factory level refresh?
Just powered off and on. Bought in Taiwan.
Ok…
Region locking is a bit weird these days…
You used to see this in DVD/Blu Ray players over content rights.
I would say do a complete factory reset. (You’ll have to look in the manual on how to do this.)
This should unlock the region and during the initial set up you should be able to set it up.
Note: This is my best guess for fixing it. Hifi Rose would have the correct answer.
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Please send the ROSE ID of the Rose device you are using to the email address below:
eunseong96@citech.kr
I will check the device.
Thanks a lot for resolving my issue! Cheers