The only mobile device I have is my Kindle Fire. Unfortunately, I only have a simple cell phone that won't work for these lessons.
At any rate - I did look up Tips and Tricks and Getting Started with the Kindle Fire. Since I teach eReader classes I have some working knowledge of using the Kindle. I also have checked out "Kindle Fire: the Missing Manual" which is pretty comprehensive.
It is so frustrating that when you get a device you get minimal instructions with the device - have to go online to get the manual or check out a book - which isn't a bad option.