Remove the back cover of the device, starting from the slot located at the lower left corner and working around the edges.
Remove the battery, lifting from the slot at the bottom.
To remove the SIM card, slide it down and 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 upper left corner.
Reinsert the battery, ensuring that the gold contacts are aligned with the contacts on the device.
Replace the battery cover, pressing around the edges to snap it into place.
The SIM card has been inserted or removed.