I tried this http://www.fredparke.com/blog/using-custom-template-files-different-display-modes-drupal-7, but doesn't work, gives errors and tried this http://drupal.stackexchange.com/questions/27025/how-to-provide-template-for-particular-view-mode kind of works, but gives errors.

My content type is product_display and view mode is Product List, created with display suite. I need this, so I could delete h2 title from it, because views forces title output via rendered entity format no matter what.