RE: Jamming authorized:

Wouldn't count on that cell phone in Canada.....

And in other news, http://strategis.ic.gc.ca/SSG/sf05958e.html : Industry Canada is announcing that it will no longer authorize the use of jamming devices. This is consistent with the Departmental mandate to manage the radio frequency spectrum. With respect to the use of jamming devices in connection with federal security and law enforcement functions for national security purposes, an alternative authorization process is currently under review.