Meta Data appearing on phone only

Hi
I want to delete the meta data and navigation from my individual blog posts. I added this code (in "Additional CSS") and it removed it from the desktop version as well as the mid-size view (ipad). However, in the phone view, it still appears. Help?

.entry-meta .byline, .entry-meta .cat-links { display: none; }
.entry-meta .posted-on { display: none;
}
.entry-meta .nav-links { display: none;
}
.post-navigation { display: none; }