Remove the back cover of the device, starting from the notch located at the lower right corner and working around the edges.
To remove the SIM card, slide it out of the slot.
To insert the SIM card, carefully slide it into the slot as shown, ensuring the gold contacts are facing towards the device and the notch is in the lower left corner.
Replace the cover, pressing around the edges to snap it into place.
The SIM card has been inserted or removed.