Is Your Site Mobile Friendly?
First off, if your blog is hosted by Blogger.com (Blogspot.com) majority of templates are mobile friendly also pretty sure "Wordpress" are (mine are paid, so not sure about the free sites.
Anyway, if you are wondering if your website/blog is mobile friendly, just put the URL (web address) in this free tool from Google
Is your website, mobile friendly?
I am re-coding some of my old "html/css" sites to make them more mobile friendly!
Almost certain that "Google" is penalizing sites that are not "mobile friendly"!