Make sure your device is turned off.

Hold the device firmly, in landscape view.

Locate the crevice that separates the front cover from the back cover. Then hold the plastic opening tool and insert the wedge portion of the tool into the crevice.

Some force may need to be applied and there may be a cracking sound. This is normal.

Slowly slide the wedge portion of the plastic opening tool while applying some upward force around the device until the back cover is completely loose.

Only apply enough force to loosen the back cover. Excessive force may damage the screen.