The OS of people’s phone isn’t relevant at all in my social circles. I don’t even know who’s using what. The whole green bubble stigma is an extremely American thing. Everyone else moved away from the default messages app at least a decade ago. I only get some 2FAs there.
I know for sure that I bought Whatspp in 2010. It was a paid app back them.
Potato potato. South Korea is the most americanized country in Asia by far.