Yes, the company which made them in Vietnam IS Korean, and they took it back to Korea, because they were not getting the quality from their Vietnam factory.
I have posted that fact before.
BTW, IT SURE DOES MATTER WHERE it is made. Anyone who says it does not is fooling themselves in the name of some odd form of political correctness.
This is not due to any inherent fault in some ethnic group.
No, It is because the bulk of people in china and Vietnam have been living on the farm, with almost no contact with machinery and technology in terms of how it is made or repaired, and limited contact with it at all. They also are typically not particularly well educated.
Sure, there are many very well-educated people in china. But that is not normal for the "peasants" out on the farm, who supply the bulk of new factory workers. People working on the farm go to work in factories, factory workers in Guangdong go to work in offices in Shanghai. So more factory workers are needed on a regular basis.
So is it any surprise that they are not as good at assembling complex devices? They don't have any background to draw on, no way to know if what they are doing is good or bad, other than what the supervisor says. And he is not always there watching.
if the build quality is not good coming off the line, no amount of inspection can fix that. It is an old manufacturing rule that you can't "inspect-in" the quality, it has to be built-in.
By contrast to china and Vietnam, Korea has 500 years of higher education, a very educated workforce, strong engineering, and 50 years or so of fairly intense industrial history, unbroken by "cultural revolutions" etc.
it is small wonder that the build quality in Korea is good. The workers have a clue what they are doing. They were not living on the farm six months ago, which might well be the case with a chinese worker.
Yes, there are bottom-of-the-barrel factories in Korea and Japan too. But the bottom of the barrel in Korea and Japan is equal to a middle range factory in china.
It's just a fact. It won't always be true, but it is still true now.
If you don't like that, my suggestion is to live with it anyway, because that is reality, regardless of any "political correctness" aspects that might prevent 'discrimination" against some nation, culture or race.......