The ornamental design for a case for electroniccommunicationsdevice, as shown and described.
FIG. 1 is a front, right-side, and top perspective view of a case for electronic communications device showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a rear, left-side, and bottom perspective view thereof.
The evenly dashed broken lines in the drawings illustrate portions of the case for electronic communications device that form no part of the claimed design.