If a SIM is not in the device the “No SIM card” message will display in the homescreen when the device is turned on. The device can only function for emergency calls to 911 in this state.
The SIM Card tray is located under the back plate of the device. To take the plate off, lift the notch at the bottom of the phone.
Remove the battery by lifting at the bottom of the battery.
The SIM card slot is on the bottom right of the phone. Insert the miniSIM card by making sure the gold contacts are facing down and the cut-off corner is at the top left.
Insert the Battery with the gold contacts touching at the top right.
Replace the back cover, press the edges so no gaps are present.