When removing the inner plate, place device on grounded surface or use anti static wrist band.

After the screws have been removed, the only thing holding the inner plate in is several plastic tabs built into the frame of the phone.

Firmly pinch the edge, as shown in the picture, and pull the plate away from the frame.

If you cannot get a grip on the inner plate, consider using the spudger to pry and lift the plate out.