1. The Missing SIM icon will be displayed in the notification bar when there is no SIM card in the device.
   
2. The SIM & microSD tray is located on the top of the device. To insert a SIM card, first insert a SIM tool or paperclip into the small hole to eject the SIM tray.
   
3. Insert the Nano-SIM card into the SIM tray with the gold contacts facing down.
   
4. Insert the SIM tray back into the device.