I previously posted about wanting to replace the back glass of my N4, and I finally got around to starting the process by removing the back glass. I will have pictures up soon, but the short story is that I strongly suggest you DON'T do it. As it turns out, the black reflective surface isn't plastic, but is more of a sticky film. On the bright side, it's much easier to remove the glass than I anticipated due to the lack of epoxy. The bad news is that my phone is unusable until I replace the glass with wood. Many components, such as the Qi charging coil are immediately behind the sticky film, while others, such as the speaker grill are held only by the film. Overall I'm disappointed in the build quality from LG on the back of this phone.