To gain access to the phone’s speaker, grip the phone firmly in an inverted position with the back of the unit facing up and the LG insignia positioned away from you.
Using both hands as support, use your thumbs to gently guide the rear housing away and in the direction of the arrow.
To separate the button board/circuit module from the phone main frame, firmly, but gently, unscrew (counter-clockwise) the seven outside 4 mm screws along the rear outside rim of the main body.
Hold the phone securely.
Be sure to use the appropriate Philips #0 screw driver for the job. Not using the appropriate tool could damage the mounting screws.
Using the plastic opening tool, gently pry the circuit board from the phone.
You may need to pry the circuit board in multiple locations to fully loosen it from the phone.
The underside of the circuit board is attached to the phone by some black tape. You will not be able to fully remove the circuit board, but you will be able to access the keyboard buttons located on the underside of the circuit board.
The partially separated circuit board may be attached to the main button area by factory adhesive/tape. If so, use a soft padded surface to rest the mother board on. Your work area will still be accessible without separating the two units.
Using the pointed end of the spudger (or something sharp like a safety pin or push pin), remove the plastic screw covers along the corners of the phone.
Unscrew the four 3.5 mm screws that are underneath the covers.