FIG. 1 is an isometric view of a first embodiment of an ornamental design for a communication device showing our new design;

FIG. 2 is a front orthographic view thereof;

FIG. 3 is a rear orthographic view thereof;

FIG. 4 is a right side orthographic view thereof;

FIG. 5 is a left side orthographic view thereof;

FIG. 6 is a top orthographic view thereof;

FIG. 7 is a bottom orthographic view thereof; and,

FIG. 8 is an isometric view of a second embodiment showing our design, the second embodiment being identical to the first embodiment except for the absence of two indented portions on the front surface of the communication device.

The broken lines shown in FIGS. 1-8 are included for the purpose of illustrating environmental elements only and form no part of the claimed design.