Corners may have adhesive. Force may be required to pry the board up. Don’t be scared.

There is metal mesh tape covering the area in the center, just above the battery, to the right of the fingerprint sensor cable connector. Remove this tape to expose a clip that holds the frame in place.

To be clear, the silver “rim” does not separate from the black portion of the frame that extends around the back and sides and covers both logic boards; this is all one single piece.

Be extra careful of the area near he power button, where the trim is thin and delicate and may break easily (especially if you’re trying to separate the silver from the black ;)

This step is not at all necessary. Just skip it, it will make no difference.

This step is not necessary if you’re careful not to rip the ribbon cable.