Is 'unsafe' and 'fixed' keywords supported on mobile platforms?

I've just read here that 'unsafe' code works on mobile platforms. It was a short statement with not a lot of comments on it.

1- I just want to ask for confirmation, does unsafe really work on mobile? has anyone tried running a game on mobile with unsafe code?

(I don't have any mobile device to test but I write frameworks and would love to take advantage of unsafe in some areas and still be able to support the majority of users using different platforms)

2- If it does, I wonder whether or not 'fixed' works as well...

3- Please say it doesn't require pro...