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4–8 Maintenance and Service Guide
Removal and replacement procedures
SIM
✎
The end user supplies the SIM, which stores the service-subscriber key to identify the subscriber on a wireless
wide-area network (WWAN). The SIM should be removed, stored in static-safe container, and replaced when
reassembling the computer.
Before removing the SIM, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on,
and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet, and then
unplugging the AC adapter from the computer.
4. Remove the battery (see “Battery” on page 4-7).
Remove the SIM:
1. Push on the SIM 1 to release it from the SIM slot.
2. Remove the SIM 2 from the computer.
Install the SIM by inserting it into the SIM slot and pushing until you hear a click.
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CAUTION: When inserting a SIM, position the card with the slanted corner as shown in the illustration. If a SIM is inserted
backwards or upside down, the battery may not snap into place properly and could damage the SIM and the SIM connector.
To prevent damage to the connectors, use minimal force when inserting a SIM.