Keep their mobile phones on silent mode for specific geographical locations.

Know location of Incoming or Outgoing phone calls or any phone number (at Country/State/City level).
It enables you to browse your PhoneBook Contacts sorted by their locations (at Country/State/City level).
Note: This application will not show the actual physical location(i.e/ GPS location) of the caller.
It will also display the time of last communication with that phone number.
It will also show Telephone Operator of the number initially assigned to.

NFC TAG App & Tasks launcher