A focus on clean geometry and flawless reflections.
The geometry looks simple but attention needs to be paid to the large blends. Softening the radius allowed space for a better transition from the flat area. The graphics are trimmed surfaces to be positioned perfectly.
A completely curvature continuous and water-tight model.
The finished file has a power button and an accurately modelled 1/8" female audio jack. All the surface transitions are G3, even the ones that don't need to be, such as the 90° intersections on the frame and the rear-clip.
Mark Costa (for the radius reduction tip)