FIG. 1 is a front perspective view of a first embodiment of an ornamental design for a communication device;

FIG. 2 is a rear perspective view of the first embodiment thereof;

FIG. 3 is a front view of the first embodiment thereof;

FIG. 4 is a rear view of the first embodiment thereof;

FIG. 5 is a first side view of the first embodiment thereof;

FIG. 6 is a second side view of the first embodiment thereof;

FIG. 7 is a top view of the first embodiment thereof; and

FIG. 8 is a bottom view of the first embodiment thereof.

FIG. 9 is a front perspective view of a second embodiment of an ornamental design for a communication device;

FIG. 10 is a rear perspective view of the second embodiment thereof;

FIG. 11 is a front view of the second embodiment thereof;

FIG. 12 is a rear view of the second embodiment thereof;

FIG. 13 is a first side view of the second embodiment thereof;

FIG. 14 is a second side view of the second embodiment thereof;

FIG. 15 is a top view of the second embodiment thereof; and

FIG. 16 is a bottom view of the second embodiment thereof.

FIG. 17 is a front perspective view of a third embodiment of an ornamental design for a communication device;

FIG. 18 is a rear perspective view of the third embodiment thereof;

FIG. 19 is a front view of the third embodiment thereof;

FIG. 20 is a rear view of the third embodiment thereof;

FIG. 21 is a first side view of the third embodiment thereof;

FIG. 22 is a second side view of the third embodiment thereof;

FIG. 23 is a top view of the third embodiment thereof; and,

FIG. 24 is a bottom view of the third embodiment thereof.

The broken lines shown in FIGS. 1-16, that are immediately adjacent to the shaded areas, and define unshaded regions, represent the bounds of the first and second embodiments, while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the first and second embodiments.