Flip the phone over so that the screen is facing up.

Wedge the plastic opening tool between the screen and the rear panel.

Push up on the opening tool to separate the panel from the phone.

Continue to do this around the entire phone until the rear panel is no longer connected to the device.

The rear case and screen are fastened tightly to each other. It might help to use the picks as wedges to keep the case and screen separated as you run the opening tool along the edges.