Important: Use a standard microSIM only. Inserting a smaller size SIM (such as a nanoSIM with an adapter or a modified SIM) may cause the card to not fit properly or damage the card slot.
Take the back cover off.
Insert a SIM card into either SIM slot as shown. If you have another SIM card, insert it into the other slot.
Note: When inserting, make sure the gold contacts on the SIM card are facing down.