iFixit

The silver piece you are left with is the physical keyboard assembly.

Remove the 3 screws holding down the flex cable.

• The screws are 2.0 mm in length.
• The screw that goes through the circle port on the flex cable is longer at 2.3mm long.

The keyboard slider frame will come off and the flex cable exposed, but not free.

Remove 4 outer screws.

• The screws are 3.5mm in length.

Slide the phone apart, and remove a 5th screw (3.5 mm).

Remove the outer shell by prying the edges off with your fingers, or a small screwdriver. (second image, taken before the image for above instruction)

The device will now be in two pieces

Lift the tab underneath the blue tape and gently pull the flex cable.

The flex cable will now be completely free.