I need to load new fonts to download, as I can do?
I’m not too sure which fonts are native to iOS/Android, but I’m sure you can look that up somewhere.
You could use something like Google Fonts, it would be as simple as copying and pasting the tag they provide you and changing your font accordingly.
Link to fonts in CSS3: http://css-tricks.com/snippets/css/using-font-face/
If you don’t want to depend on an internet connection so that the fonts are downloaded, download the font in FontSquirrel, and then use their webfont generator which will spit out web fonts and a css file for you to use.