This was one of the product modeling tasks I had to do. The case was 3D scanned & then cleaned up in Zbrush.
Reference image above. Zbrush model below (before clean up).
The goal was to remove any geometry the model had, close out any potential holes within, create a new UV map for it & have it be under 10k tris. The zipper & clip buckle had to be remodeled because the small details on them were not captured.
Final renders below done in Unreal Engine.