The Galaxy J6 looked like a piece of cheap plastic in official renders, just like this one, but when I actually gave one a hands-on it felt decently nice. I believe it's just matter of their renders being bit *too* honest.
According to Samsung Indonesian which has just aired earlier today, the front of the Samsung J2 Core had no physical buttons. But the bezels is as thick as 2016 smartphones with SAMSUNG text on the bottom bezel.
This will be great if sub $100 , i hope has most bands though for global release.