Remove the back cover
Turn the back of your phone towards you and slide the back cover catch right.
Take hold of the bottom of the back cover and remove it.
Insert your SIM
Place your SIM as illustrated in the SIM holder and slide it in.
Insert battery
Place the battery in your phone, bottom first, matching the battery contacts with the phone contacts, and press it into place.
Replace the back cover
Place the back cover on your phone, bottom first, and press it into place.
Slide the back cover catch left.