There is also a dickbutt edition, for if you feel like one.

Download the Fusion360 source file here: https://a360.co/2qFZT0e . Everything is adjustable. You can make the case a lot thicker if you plan on using the phone as a projectile.

Print in TPU. You can give the case some nice patterns by not printing any top or bottom layers and 3 walls/perimeters. This way the back of the case will be show a bare infill pattern.
In my example I used 25% triangular infill, and set a infill line multiplier of 3.

Updates:
15-nov-2018 - Slightly tweaked the fit

0.2mm

100%