This is simply a phone case with a changeable face. The reason why I made this is so you can make your own face for the case and be able to change it out whenever. This giving your phone a new look (the front part) when you want.
It should be noted you don't actually need the case file. You simply need the flap and face. You can install the flap on any case model. I would recommend the side with no or not as many buttons. Obviously the face you can make your own since it's pretty straight forward.

Please feel free to make some cool faces for your phone and take pics. Also let me know how I did. I don't have my 3D printer yet, and I have no way of testing things.

(The phone case has no buttons added in it, the back has no cuts, and so on. Again, you can use a phone case that is already modeled. Just take the flap and put it on one of the sides. The reason why I have a hole on my face is I can use that for a time window.)

You need to print the flap out of flex.