Remove the battery cover by lifting from the slot on the top-left of the phone.
Remove the battery by lifting from the slot on the bottom of the battery compartment.
To remove, pull the SIM card out of the slot.
The SIM card is now removed.
To insert, slide the SIM card into the slot with the gold contacts down and push until it stops.
To replace the battery, ensure the metal contacts on the battery and phone are aligned and then press the battery into place.
Reattach the battery cover, pressing around the edges to snap into place.