mmowaffak, Jun 17, 2019 : One of the handy security features in Samsung Galaxy Series OS is the ability to require some form of authentication to shut down your phone. In my opinion this is an essential security feature as I can briefly demonstrate: A month ago my father's phone (Samsung G Note 8) was stolen from his clinic, after panicking for a while he called me and I opened Find My Android to my surprise find the phone nearby. This is very very unusual as here in Egypt usually the first thing that a thief does is turn the phone off so u cant trace it, send it to a phone shop to wipe it and resell it. in this case however the battery is unremovable, the phone cannot be shutdown, and I had the opportunity to track down the thief and have him arrested!! It is a very very unlikely scenario here in Egypt where when you're phone is stolen, 90% of the time you won't get it back. In this case, this one single feature saved us around 800$. I strongly recommend adding this natively in Oxygen OS as all third party apps aren't doing an adequate job. What are your thoughts people?