: Lower the metal holder and slide it back to the right to lock the card in place.
: Place the Mini-SIM card into the slot with the gold contact area facing down . Ensure the cut corner of the SIM matches the orientation shown in the slot's diagram. Nokia Asha 311 Insert Sim
If the phone displays an "Insert SIM" or "No SIM" error after installation, try these common fixes: : Lower the metal holder and slide it