Lenovo K23 Notebook - Manual (Page 49)

Chapter 3. Using the Internet
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5
Put the battery back in place, turn the computer over again, and
reconnect the cables.
Removing the SIM card
To remove the SIM card:
1
Turn off the computer, then disconnect the AC adapter and all cables
from the computer.
2
Close the computer display and turn it over.
3
Remove the battery.
4
Push the SIM card in until you hear a click, and then pull the SIM card
out.
5
Put the battery back in place, turn the computer over again, and
reconnect the cables.
Note: Never insert or remove the SIM card while the computer is on. Doing so may
cause permanent damage to the SIM card as well as the SIM card reader.