Remove the battery cover using the slot on the top left of the device.
Remove the battery by lifting from the slot at the bottom.
To remove the SIM card, carefully slide the SIM card out of the SIM card slot.
To insert the SIM card, carefully slide the SIM card up into the SIM card slot, with with the angled corner facing the top left.
Note: The SIM card slot is located below the SD card slot.
Place the top of the battery in the compartment, ensuring the gold contacts align with the terminals at the top of the compartment, and then slide the bottom of the battery into place.
Reattach the back cover, making sure to press around the edges to snap it into place.
The SIM card has been inserted or removed.