I looked up the dimensions for my phone online. I then created a box with these dimensions. I used the fillet feature to round the edges, as a real phone has. I then created a box that is bigger than my phone outline, for the case. I used the difference feature to remove the spot where my phone would be. This created the case. This was useful to me because I used the 3D printer to create a phone and pencil holder. I simply copy and pasted in the dimensions of my phone case into the design for the holder. This project was not very hard, however I was successful in creating the case.