To confirm the amount of memory installed in the computer, click Start or →Help and Support→Computer Information .Subscriber Identity Module (SIM) CardCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformation Guide .1 Follow the procedures in "Before You Begin" on page 107.2 Remove the battery (see "Replacing the Battery" on page 33).11 SIM card3 Slide the SIM card into the compartment with the cut-off corner of the card facing away from thecompartment.4 Reinstall the batter y.Wireless CardsIf you ordered a wireless LAN or WAN card with your computer, the card is already installed.CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformation Guide .NOTICE: To avoid damaging the system board, you must remove the main battery before you begin working insidethe computer.Adding and Replacing Parts 119
