Nokia 6233 User Manual page 20

3. To release the SIM card holder, gently pull the locking clip of the
card holder, and open it (4)
Insert the SIM card into the SIM card holder (5). Make sure that the SIM
card is properly inserted and that the gold-colored contact area on the card
is facing downwards.
Close the SIM card holder (6), and press it until it snaps into position.
4. Replace the battery (7)
5. Place the back cover in the correct position (8).
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