Heat the entire front of the display up with a heat gun. A hair dryer will work as well.

Stick a finger nail in an area with a small seam - I found one around the top right - and pry it open just enough to fit a spudger.

Run it all the way along the edge of the display. There are no sensitive ribbon cables to break, but pay close attention to the silver speaker at the top, and the home button at the bottom.