If you are so skittish that you're afraid a cell phone is a gun, you are not emotionally competent enough to be a law enforcement officer.
If you are so stupid that you think a cell phone is a gun, you are not mentally competent enough to be a law enforcement officer.
If you don't understand that it is someone's second amendment right to have a gun on their person on their property, you are not educated enough to be a law enforcement officer.
It sounds like this dude didn't even have a gun on him. He obeyed all of the officer's commands and still got shot.
Half this country is concerned that the people crossing our border aren't the "best and brightest" but what about our law enforcement? It's certainly not the "best and brightest" who become officers.