Phone Amplifier for Galaxy S4

I designed this after noticing that when I put my phone on a notepad and exposed the speaker, the volume got substantially louder, so I came up with this. Print at 20% infill. I printed this  at .1 resolution. Use a brim and lots of hairspray to avoid warping. I print at 200 degrees with the bed plate temperature of 50. I think your ideal settings may differ depending on what brand of filament you have. it works. Enjoy!