1. Lift up the back cover using the small notch at the top-left of the phone and remove the battery. (Using your thumb makes it easy)
2. Insert the SIM card with the metal contacts facing down. Slide it into the SIM card slot.
3. Line up the gold contacts on the battery with the contacts on the phone. Insert the top part of the battery first, then push it into place.
4. Line up the battery cover hinge with the designated holes inside the phone, then push the cover down until it clicks into place.