What is the minimum smartphone screen size to consider in responsive design?

Question

css

I want to make a version of the site for smartphones,
what is the minimum size to take into account?
it is necessary to cover the vast majority, not necessarily all,

probably 320x480 is no longer relevant?

Maybe FullHD and above is already a standard?
i.e. 960x540 css pixels

Answer 1

Oh damn, as usual. You still start to prescribe a vertical view)
You have an adaptive, so write from it

@media (max-width:768)
{
.lorem img{
width: auto;
height: 100%;
}
}
@endmedia

Answer 2

If you are already very progressive, then look at the viewports of the displays of folding smartphones, 280 seems to be at the fold, but 320