Just a basic note for the future, there are two (or was it 3?) screws hidden under a separate plastic piece that I thought was part of the non-battery cover back half of the phone's case... So my spare phone took some major damage in my attempts to pry it apart. Eventually said plastic piece popped off and I saw the screws.

There are also of course several plastic latches that I ended up breaking along the way. The screws do a good enough job holding the phone together.

And yes, I can reassemble the components and the phone turns on fine :D