Why does the grid under bootstrap for mobile devices (320 px) have only 6 columns?

Question

Design

I downloaded the bootstrap grid for mobile devices, 320 px wide. There I saw only 6 columns, 23px wide and 30px indented. Is this the correct version and how to use it? Why 6 columns and not 12? How will it be laid out?

Answer 1

did you download it?
Everything is fine. the layout designer will simply use 2 columns instead of one.
and what are you going to do with 12 columns at a width of 320px?

Answer 2

Something you have not downloaded apparently. col-xs-1 - col-xs-12 all 12 columns are in place.