Samsung Galaxy Note 5 rear camera replacement, front camera replacement and earpiece replacement share most the same steps, so show them together.
Rear camera, front camera and earpiece
Remove the Sim card tray.
Remove the S Pen.
Remove the back cover.
Remove the screws.
Remove the middle housing.
Remove the battery. But it's not necessary. You also can just release battery connector from motherboard.
Release the connector on the board.
Release the USB board connector on the back and remove the motherboard from front assembly
Remove the rear camera
Remove the front camera and noise-canceling mic
Remove the earpiece assembly.
To reassemble your device, follow these instructions in reverse order.
TOOLS: needed
Heat Gun (1)
iFixit Guitar Picks set of 6 (1)
Small Suction Cup (1)
Phillips #000 Screwdriver (1)
Spudger (1)
PARTS: needed
Samsung Galaxy Note 5 rear camera (1)
Samsung Galaxy Note 5 front camera (1)
Samsung Galaxy Note 5 rear camera (1)
Samsung Galaxy Note 5 front camera (1)