Locate the modem card and remove the 2 M2.5×4.0 screws

The modem card is it is plugged into a connector on the logic board. Gently lift the card up and out of the laptop

A plastic spudger may be useful in lifting the card out

Be careful as there is a small cable connected to the edge of the modem card closest to the LCD display

Disconnect the cable from the modem card to complete removal