Lift the battery, which covers the left screw.

Use the JIS0 (Philips) bit. Unscrew the black screw, which is circled in pink. Next, unscrew the two identical silver screws, circled in blue. Unscrew the black screw, which is circled in pink.

The silver screws secures the trigger components and main board to the top case. The black screw secures the main board to the D-pad board.

There is a small black wire antenna for bluetooth. It is taped on to the plastic case to the left of the micro USB port. use a spudger to lift the tape.