The ornamental design for a wallplatecover for electronic device, as shown and described.
FIG. 1 is a front, top, and right perspective view of wall plate cover for electronic device showing claimed design;
FIG. 2 is a front view thereof;
FIG. 3 is a back 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;
FIG. 8 is a front, top, and right perspective view thereof, shown with environment; and,
FIG. 9 is a cross-sectional view taken in the direction of line 9-9 shown in FIG. 8.
The short evenly spaced and long evenly spaced broken lines in the views are directed to environment and the long dash short dash broken lines and arrows are used to identify the cross-section view. The broken lines form no part of the claimed design.