This does not surprise me at all. What I want to know is how they enforce it.
Unless they have something better than "fear of somebody seeing you using the smartphone", it isn't getting enforced. If they do have something better I want to know what.
No, I'm not joking. One of my high-school classmates works as R&D there. They ask you to pass through a metal detector gate, take away your phone if found, then give your a company phone for emergency call only. It's that strict (at least for R&D. Probably not for management and others).
This is what I'm interested in.
I get it, the guys in bunny suits will probably tolerate being groped and wanded every workday for the rest of their career. I have a hard time beliving the scientific staff and executives tolerate that.
They put a special sticker on all of your cameras and inspect if it is still there on the exit.