Use the screwdriver to remove the screws from the top and bottom of the telephone jack wall cover.
Remove the telephone jack wall cover from the wall. Pull the telephone jack cable out of the wall cover, and place it inside the hole in your wall.
Attach the solid plate wall cover to the wall, where your telephone jack cover once was. Use the screwdriver, and the screws you removed in Step 1, to screw the solid plate wall cover to the wall.