Dell Latitude D420 Service Manual page 13

NOTICE: To avoid damaging the Mobile Broadband card, never place cables on top of or under the card and ensure that you route the cables properly.
NOTE: Cable routing for the Mobile Broadband card may vary.
b. Align the card with the connector at a 45-degree angle, and press the card into the connector until you feel a click.
1 Mobile Broadband card 2 system board connector
NOTE: For more specific information about which cable to connect to which connector, see the documentation that came with your Mobile Broadband
card.
c. Connect the white antenna cable with the black stripe to the connector on the card marked with a white triangle; connect the black antenna
cable with the white stripe to the connector on the card marked with a black triangle.
Subscriber Identity Module (SIM) Card
NOTICE: To protect the SIM card from electrostatic discharge (ESD), do not touch the SIM card connector. Also, take care when removing the card to
slide the card completely out of the metal tabs before lifting the card out of the slot. The card is brittle and may easily break otherwise.
NOTE: The SIM card is located in the battery bay. You must remove the main battery before you can access the SIM card.
1. Slide the SIM card out of the SIM card slot with the cut-off corner of the card facing toward the back of the computer.