Once the back cover has been removed, removing the antenna is as simple as unscrewing one screw.
Orient the phone so that the phone model and other descriptive information is facing upward.
Locate the two silver screws near the hinge where the battery is housed.
Remove the silver screws using a Phillips head #2 screwdriver.
Make sure you pull the cover off carefully in order to prevent damage to the back cover.
Find the silver screw located in the red circle.
Using a Philips head #2 screwdriver, remove the screw holding the antenna in place.
Press the release button.
The release button is located in the red circle in the image to the left.