Lenovo ThinkPad L520 (English) User Guide - Page 122

Replacing the SIM card, The SIM card is identified by the IC chip mounted on one side of the card.

Page 122 highlights

To install a repaired drive or a new one, do as follows: 1. Insert the drive in the bay, and then press it firmly to the connector. 2. Reinstall the screw and tighten it. 3. Reinstall the battery and turn the computer over again. Then reconnect the ac power adapter and the cables. Replacing the SIM card Your computer may require a SIM (Subscriber Identification Module) card to establish a wireless WAN (Wide Area Network) connections. Depending on the country of delivery, the SIM card may be already installed in your computer or will be part of the shipping contents that came with your computer. If you find the SIM cards included in the shipping contents, a dummy card is installed in the SIM card slot. Then proceed to the following instructions. If you find the dummy card in the shipping contents, the SIM card is already installed in the SIM card slot, and no further installation is needed. Note: The SIM card is identified by the IC chip mounted on one side of the card. Before you start, print these instructions. Replacing the card To replace the SIM card, do the following: 1. Turn off the computer, then disconnect the ac power adapter and all cables from the computer. 2. Close the computer display, and turn it over. 3. Remove the battery. See "Replacing the battery" on page 89. 104 User Guide

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To install a repaired drive or a new one, do as follows:
1. Insert the drive in the bay, and then press it firmly to the connector.
2. Reinstall the screw and tighten it.
3. Reinstall the battery and turn the computer over again. Then reconnect the ac power adapter and
the cables.
Replacing the SIM card
Your computer may require a SIM (Subscriber Identification Module) card to establish a wireless WAN (Wide
Area Network) connections. Depending on the country of delivery, the SIM card may be already installed in
your computer or will be part of the shipping contents that came with your computer.
If you find the SIM cards included in the shipping contents, a dummy card is installed in the SIM card
slot. Then proceed to the following instructions.
If you find the dummy card in the shipping contents, the SIM card is already installed in the SIM card
slot, and no further installation is needed.
Note:
The SIM card is identified by the IC chip mounted on one side of the card.
Before you start, print these instructions.
Replacing the card
To replace the SIM card, do the following:
1. Turn off the computer, then disconnect the ac power adapter and all cables from the computer.
2. Close the computer display, and turn it over.
3. Remove the battery. See “Replacing the battery” on page 89.
104
User Guide