Interested in understanding if there is a simple way in k2 subtemplates to disable or not show certain content in the mobile view of a template. For example if I did not want to show related links and no K2 plugins in a phone view.

Thanks

This can be done with css.
An excellent resource can be found here: foundation.zurb.com/docs/components/visibility.html

This post will help you with the overrides.
getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates