Prop the motherboard on the side of the phone. Then take off the power button board (near the top of the antenna wire).

Remove the 2 Phillips head screws located at the bottom of the charging board.

Some models may have a ribbon flex button that sticks to the side of the phone, instead of one directly on the board. To remove, you must gently peel these from the sides of the phone using a thin spudger, otherwise the delicate ribbons may rip and you may not be able to power on your phone.