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A SIM enables you to use mobile network services such as voice calls, text messaging and mobile data.
Turn the back of your phone towards you. Take hold of the back cover and remove it.
Slide the cover for the first SIM holder right and open it.
Turn your SIM as illustrated next to the first SIM holder and place it in the SIM holder.
Close the cover and slide it left.
Slide the cover for the second SIM holder left and open it.
Turn your SIM as illustrated next to the second SIM holder and place it in the SIM holder.
Close the cover and slide it right.
Place the back cover on your phone and press it into place.
