A step by step guide to removing and replacing the Samsung SCH U340's internal antennae.
Turn the cell phone so that the back side is facing you. Press the upper indent and slide the back cover down.
Pull battery up from indent at the bottom and slide it out.
Set the battery aside.
The lower casing is held on by four screws in the corner of the battery enclosure. Remove these screws.
Use a spudger to pry the back assembly off of the device.
On the bottom casing, there should be a single metal screw holding the antennae in. Remove this screw.
Pry the antennae off by inserting a flat object such as a spudgel into the slot marked in yellow and pushing upwards.