Reassemble the Nokia 6102i
With the screen facing up, connect the display connector to the smaller of the open connectors on the motherboard.
Place the metal case over the top of the screen so that it snaps into place.
Insert the circuitboard into the back of the phone, with the inside screen facing down.
Lightly press down on the left hand corner so the circuitboard attaches to the phone.
Snap the top cover into place so that the outside screen is visible. Press around the perimeter to secure the case.
Open the phone and insert the screws tightly.
This step does not require much force.
Snap on the black piece over the exposed screws.