My advice, take the screws out and arrange them laid out as though they were in the phone still.
I use an old mouse mat.
Battery out, speaker enclosure screws out, work way up the board taking the screws out. Undo the screws on the black metal cover lay them out left to right in order, watch the top middle screw its long and is held into the black cover by a small clip, dont lose that, dont lose the tiny little nut on the 3rd screw from the right, it sits under a small metal fork. Then vibrator out – ooerr. Unclip all the connectors carefully, camera out. Sim tray out. Board out. 4 screws 1 in each corner out. 3 screws each side holding screen, undo half turn. Flip phone and lever screen off.
REMEMBER to swap the earmesh over – i always used to forget and dont trap the cables one will want to trap itself, make sure theyre the same length.
Reassemble in reverse order…make sure the 4 little clips on speaker enclosure sit at the side of the frame not on top