Use your thumb and finger on the rear-facing side of the mid-frame to pry apart part of the mid-frame, enough for you to slip your plastic card into.

Slip the card in between the EPD panel and mid-frame, and pull it around the perimeter and push it in and out, in order to break adhesive holding the former in place.

You may need to use your thumb and finger to bend the mid-frame and break some of the adhesive.