Follow these steps to learn how to insert a SIM card into your phone.
Open the SIM card holder on top or side of your device with the removal tool.
Take SIM holder out of your phone.
Insert SIM card into SIM holder. If you have another SIM card, insert it into the second spot in the holder.
Insert SIM holder into SIM slot.
Your device will now be able to connect to a mobile network and receive calls.
Note: The SIM card may require a PIN code. (Default codes are often set to 0000 or 1234.)