Remove the four H2 screws from the back of the phone. Do not lose the black rubber rings on the screws.
Remove the two H2 screws, on either side of the phone. Do not lose the red seal that are on the screws.
Using a prying tool work off the back of the case. Ensuring not to lose the port covers. Be careful to note the position of connector covers. Have the tabs at the end of the connectors in place before clipping the phone completely back together.