[xyzzy21]

All Asian Fabs pretty much ban all smart phones - you have to leave them outside and/or you have to use a "dumb" phone. Laptops, USB drives, etc. are absolute verboten as a vendor or contractor and usually employees as well who have to smuggle them in to get work done. If you violate these bans as a contractor or vendor, YOUR ENTIRE COMPANY can be banned from doing business indefinitely.