I tried this methods link to speed site, but still not working. please suggest me how to speed up the site for mobile version.
I had similar issue and i got 84/100 after optimize css delivery, but optimizing js delivery is not much easy as magento need to load some js at top of page. pls read this article, u can get some help http://www.sagaracommerce.com/blog/optiming-css-delivery-for-magento-as-per-google-page-speed-insight-tool/
I installed pagespeed mod for apache on my server.. Things are 90+ now. If you have root access, i would recommend doing that. Link:- https://developers.google.com/speed/pagespeed/module/