134 Adding and Replacing PartsSubscriber Identity Module (SIM) CardCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in theProduct Information Guide.NOTICE: To help prevent damage to the system board, you must remove the main battery from the battery baybefore you begin working inside the computer.1 Follow the procedures in "Before You Begin" on page 113..NOTICE: Do not touch the SIM card connectors to protect the card from electrostatic discharge (ESD). To preventESD, hold the card in your hand before you insert or remove the card.2 With the cut-off corner on the card facing away from the card slot, insert the SIM card into the slot sothat it slides under the metal tabs on the sides.Internal Card With Bluetooth® Wireless TechnologyCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in theProduct Information Guide.NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodicallytouching an unpainted metal surface (such as a connector on the back of the computer).1 battery-bay latch release 2 SIM card12
