We claim the ornamental design for a cover for an electronic communications device, as shown and described.
FIG. 1 is a front perspective view of a cover for an electronic communications device with the LED display in an active state, showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a front view thereof with the LED display in an inactive state.
The alternating long-dash, short-dash broken lines in FIGS. 1, 2 and 8 represent a boundary of the claimed design. The bold broken lines along the edge of the claimed design depict stitching that forms part of the claimed design. All other broken lines in the figures show portions of the cover for an electronic communications device that form no part of the claimed design.