LG C3400 Guide De L'utilisateur page 22

3. Install the SIM card
Insert the SIM card into the holder. Slide the SIM card into the
SIM card holder. Make sure that the SIM card is inserted
properly by ensuring that the gold contact area on the card is
facing downwards. To remove the SIM card, press down lightly
and pull it in the reverse direction.
To insert the SIM card
Caution
The metal contact of the SIM card can be easily damaged by
scratches. Pay special attention to the SIM card while
handling. Follow the instructions supplied with the SIM card.
To remove the SIM card
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