I printed this on the Form 2 printer and have included both the original CAD file, a STEP file and 2 STL files, The corrected STL file (Scaled to fit) worked on my printer but if you are using a different one I would recommend using a program like Meshmixer or your slicer to scale the part to work on your printer. If you need any modifications made let me know and I'll see what I can do. The case is designed to work with the button inserts I also designed. I designed these parts with an offset so any well calibrated printer should be able to print them. If you want any changes made to those let me know.

I designed this in solidworks using my other file the S5 reference model found here https://www.thingiverse.com/thing:2829098 as a tool body to cut away the shape of the phone from a general form.