This case has an open back, it surrounds just the edge and the cameras to make it easier to hold and add some fall protection. It needs to be printed in TPU or another flexible material. The original has 5 holes in the edge for buttons, power, microphone and speaker. In order to avoid using supports, this model leaves material in the center of the holes which can be cut out in post processing. Additionally I have included a dummy model of the edge of the phone to use to support the case while printing the top. The process is not that complicated and ends up tidier than using supports.
To print this model without supports:
The author remixed this model.
This remix removes most of the back of the case to reduce printing time and cost. I also made modifications so that it can be printed without supports.