This guide will cover the removal out the Samsung SCH U340s outer casing.
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.