I put my phone on fingerprint lock last night and got locked out this morning, and couldn't remember the other password, my Google password, etc. My PIN was not an option. After so many tries, only the alternative password will work. So I had to go to a store and have it factory reset. I mostly had music and pictures on an SD card, so that was fine. So I have been downloading lots of apps from Google and Amazon and getting my customising settings back. Needless to say, I've gone back to a PIN lock. Also, of course, YKWIA and A laughed their butts off. Sheesh.