Phones live in many places. In pockets, on tables, in a car dock, but most importantly, in the hand.
The form of this phone had to be sculpted and tested by feel, using cardboard, plywood, and other materials, I started to work on prototypes for different form factors.

A phone made for heavy music and podcast listeners needs to be designed with audio at the center of the experience.
The Spotifone would need to pack larger speaker systems than most phones, and of course, include a headphone jack.