If a SIM is not in the device the “No SIM” 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-left of the phone.
Remove the battery by lifting at the bottom of the battery.
The SIM card slot is above the battery compartment. Insert the microSIM card by making sure the gold contacts are facing down and the cut-off corner is at the top left.
The MicroSD card slot is located to the left of the SIM card slot. Insert the MicroSD card by making sure the gold contacts are facing down and the cut-off corner is at the bottom right. Note: SD cards are sold separately. To prevent data corruption, it is recommended to unmount your memory card before removing it. To unmount your memory card, tap Settings > Storage > Unmount SD Card.