Nokia 3100 Extended User Manual page 25

2. To release the SIM card holder, gently pull the locking
clip of the card holder (4) and open it (5).
3. Insert the SIM card into the SIM card holder (6). Make
sure that the SIM card is properly inserted and that the golden contact
area on the card is positioned as shown.
4. Close the SIM card holder (7) and press it until it snaps into position.
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