I currently work a job as a security guard and my company has a no phone or electronics use. The thing is I make slightly above minimum wage so I basically ignore that rule. Plus, I am working at a site where I have mostly nothing to do. Sure, I do my patrols but they only take me 10 minutes to complete. I do about 3 rounds in 8 hours and in between rounds it is really low activity. If I got nothing going on than you bet your ass that I am going to be using my phone or gaming devices to pass the time. As long as the tasks are getting completed in a timely manner why should it matter?