Sorry...I need to clarify...I only have the shortcut button on my home screen. I do not have the double tap on or off functionality turned on. So I can tap the screen all day long and nothing happens, which is fine. But I still wanted to be able to lock on demand. I have my power key to only turn the screen off as for my use that works better than trying to double tap the screen. But I still wanted a quick way to "lock" on the fly so I had the shortcut put on my home screen and I use that to instantly lock the device. In this scenario PIN is required so I can't use fingerprint, but the times I would use it that is o.k. with me...I'd be using it when not in my normal, safe environments (so don't need it at home or friends or the car). Hope that made sense. Really I probably need to just go back into the play store and look for a "lock" app...that's all I really need.