Unscrew the antenna by grasping the base and twisting counterclockwise.
The antenna may separate from a black sleeve during removal. You may need to use tweezers to remove the sleeve. Remove both the antenna and the sleeve and set aside.
The phone may have a rubber insert in the bottom of the phone (see picture). If this rubber insert exists, remove it from the bottom of phone and set aside.
With the phone flipped open, wedge the back cover from the faceplate by running the tip of the plastic opening tool around the seam on the back of the phone.
Gently pull the two pieces apart to separate, and set the back casing aside.
Apply enough force to separate the pieces without cracking the back cover.