I’m a teaching assistant at an elementary school where phones are banned until the final bell rings. The kids are completely used to it now, and as a result, they pay much more attention in class. The middle school nearby recently adopted the same policy, and while there was a lot of drama at first, people have adapted, and things are running more smoothly. Since the current elementary students are already familiar with the no-phone rule, I expect that when they move up to middle school, they’ll adjust easily.
In a few years, this policy will likely be widely accepted, but it probably won’t feel totally smooth until these students reach high school.