When in Solo mode, I hit the Stop button and nothing happens.

What happens if I receive a phone call during a game or a battle?

Your game/match will be cancelled, and after the call is done you can start a new one from scratch.

My app says my cube is unsolvable

1. If you know how to do it, solve the cube that's the simplest way. You will end up with a clear understanding of which piece is twisted. Just twist the wrong piece back into place, and load a…

One of the cube pieces fell off, what can I do?

As long as it's not broken, you can reattach it by doing as it's shown in this video

My cube's battery died in the middle of a game. Do I need to start from scratch, or can I keep playing after I’ve charged it?

Unfortunately, you will need to start from scratch.