There are no exterior screws. The top and bottom panels of the rear case are made of plastic, but cannot be separated from the rest of the case.

Prying the body of the phone out of the rear case is fairly straight-forward, the plastic clips holding it are flexible enough to bend without breaking, and are not too strong.

Fingerprint sensor cable connects the rear case to the interior of the phone, but is long enough that you can safely disconnect it without damaging it.