We will start by removing the three SIM / SD trays to remove the back cover.

With an opening tool, we will lever between the frame and the housing to release the notches that hold it.

Now we remove the nine screws from the plate housing and remove it.

In this step we disconnect the components of the motherboard.

With the components disconnected, we remove the two screws that hold the plate, take off the vibrator from the chassis and disengage it.

Now we remove the screen and the rest of the components that are still in the chassis.

Now there is only the full screen with chassis. To separate them, you can follow the steps of this other guide: https://goo.gl/uEwpS0