Wait, so I should wipe my phone BEFORE I back it up? I'm currently on the Dev Preview now, but I'm thinking I'd like to go back onto the mainstream so I always have a stable platform. How do I do that?
Apologies, poor use of English on my part.
You apply the backup after all updates been installed. Unfortunately if you're going back to what it was, before 8.1, you can't apply the 8.1 backup you have from Cloud, as far as I can tell...