Remove the back cover
Turn the back of your phone towards you.
Take hold of the the top of the outer back cover and remove it.
Take hold of the the top of the outer back cover and remove it.
Take hold of the the top of the inner back cover and remove it.
Insert SIM
Turn your SIM so the angled corner of your SIM matches the angled corner of the SIM holder and slide it in.
Insert the battery
Place the battery in your phone (top first), matching the battery contacts with the phone contacts, and press it into place.
Replace the back cover
Place the inner back cover on your phone and press it into place.
Place the outer back cover on the phone (bottom first) and press it into place.