Board Thread:Game Discussion/@comment-34676248-20180314195007/@comment-27798333-20180315085252

Although I've never done it, you would have to sign in to game 1 using Facebook. That will associate the two. Cloud save. Close.

On the second device, if it's someone else's game, you would have to clear the local save (after doing a cloud save), then sign in using YOUR Facebook acct. Then restore from cloud while signed in to your FB acct in the game.

I've heard it will work, but be careful. FM has rules again more than one acct on a device. It must not have remnants of info left over in the game from anyone else.