Remove the back cover on the phone by pressing down on a corner of the phone and working around the edge of the cover.
To remove the battery, lift from the slot at the top of the battery compartment.
With the gold contacts on the SIM facing down, insert the SIM card into the slot.
To remove the SIM card, push on the front edge of the card until it releases from the slot.
To insert the battery, ensure the metal contacts on the battery and handset are aligned and then press the battery into place.
Replace the back cover.
The SIM card is now inserted or removed.