I have a S6 with Marshmallow that is not rooted and I'm looking for a way to disable the power button so it is impossible to turn the phone off. My reason is we have a phone thief at work. He has stolen 4 android phones in the last 3 days. I have no idea what this punk is doing with them but he is smart enough to power them off so they cannot be tracked. I have "Where is my droid" installed but it obviously won't work if the phone is off. I also have Tasker (one of my FAVORITE apps!) that I have been playing with but cannot find a way for it to do what I want either. The perfect goal would be the user would have to input a pin or fingerprint to completely shut down the phone. This of coarse would only work if the phone is one where the battery cannot be removed, which the S6 is. Any help would be great!