Another angle on this: major semiconductor fabs in Asian DO NOT ALLOW smart phones for espionage/IP reasons. So most vendor sales people have only dumb phones

Another angle on this: major semiconductor fabs in Asian DO NOT ALLOW smart phones for espionage/IP reasons. So most vendor sales people have only dumb phones because they can bring them inside and take calls on visits. Smart phones have to be left at the guard shack in the parking lot. This is also true for many non-semiconductor manufacturing industries. Bringing in computers??? Forget about it. I would bring in my computer sometimes but only with special 3rd level manager dispensation and I had to have all the ports taped up with security tape, have all "radios" (WiFi/BT) turned off (under threat of vendor "permaban" - imagine explaining to your boss you got the entire company banned), only being allowed CDRs going in for S/W update (no flash drives) and only taking out written paper notes for debugging back to support or R&D via your phone back in the parking lot. Essentially something worse than returning to the pre-internet 1970s or 1980s but with all the product complexity of today. Dumb phones have been a thing for a long while because of this.