Lenovo ThinkPad S540 User Manual page 86

Before you start, print these instructions.
SIM card is a small plastic card with an Integrated Circuit (IC) chip mounted on one side of the card.
If your computer supports wireless WAN connections, your computer might require a SIM card to establish
wireless WAN connections. Depending on the country or region of delivery, you might need to purchase a
SIM card or a SIM card might be part of the shipping contents that come with your computer.
To install or replace the SIM card, do the following:
1. Disable the built-in batteries. See "Disabling the built-in battery" on page 69.
2. Close the computer display, and turn the computer over.
3. Locate the SIM card door at the right side of the computer from the bottom view. Gently pivot the SIM
card door upwards and press it towards the right side.
To install the SIM card, go to step 5. If you are replacing a SIM card, please continue.
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User Guide