The ornamental design for a handset, as shown and described.
FIG. 1 is a perspective front view of a first handset showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a rear view thereof.
The broken lines shown throughout the views that are immediately adjacent to the shaded areas and define unshaded regions, represent the bounds of the claimed design, while any other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.