LG K580 User Manual page 523

4
Insert the card tray back into the slot.
Of several types of SIM cards, only the SIM cards work with the device.
For problem-free performance, it is recommended to use the phone
with the correct type of SIM card. Always use a factory-made SIM card
supplied by the operator.
Precautions when using SIM card
Do not lose your SIM card. LG is not responsible for damage and other
issues caused by loss or transfer of a SIM card.
Be careful not to damage the SIM card when you insert or remove it.
Basic Functions 28