Remove the back cover from the cell phone to expose the battery and internal parts of the phone.
Turn phone over in the palm of your hand, with the screen facing down.
While grasping the bottom part of the phone with one hand, use your thumb to push the release button at the end of the phone.
This will release the back plate latch; then lift the back plate up and out toward the other end of the phone.
You should now be able to lift the plate completely off the phone.