The ornamental design for an accessory for a smartphone or other mobile device, substantially as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a photograph showing a perspective view of our design;
FIG. 2 is a photograph showing an elevation view of the front of our design;
FIG. 3 is a photograph showing an elevation view of the rear of our design;
FIG. 4 is a photograph showing an elevation view of the left side of our design;
FIG. 5 is a photograph showing an elevation view of the right side of our design; and,
FIG. 6 is a photograph showing a plan view of the top of our design.