Samsung already makes most of their phones in Vietnam. Not a huge difference, other than the lack of tariffs. https://www.economist.com/asia/2018/04/12/why-samsung-of-sou...
I wonder why more producers haven't made this move? If Vietnam is there as far as infrastructure goes and they have the skilled/unskilled labor why is this not a more popular move. Also when we say "make" I assume we mean "assembles". Somewhat anecdotally I recently purchased a laptop and tried to find one that wasn't made in China and it was nigh on impossible.
It's better than Laos/Cambodia, but the streets are now flooded with cars far more than even 1 year ago, and the traffic is becoming a huge issue.
And right now, with all the new factories, Vietnam is suddenly almost as polluted as China. (Just recently we have record AQI numbers here.) But of course rich countries don't care about that, as long as the phones are cheap...
All in all, people are happy, since it helps their bottom line. But the infrastructure is not there yet to beat China.