They wouldn't have to "conscript" or confiscate the handsets, just turn off the towers. Cell phones always communicate via the a near by tower. Two cell phones a block away won't communicate if there is no tower. (How could they bill you?)
Ryongchon is pretty close to China. In this border area, you can use a Chinese cell phone, which uses towers in China across the border. N. Koreans cannot turn off Chinese towers. An important fact to be noted.
"They wouldn't have to "conscript" or confiscate the handsets, just turn off the towers. Cell phones always communicate via the a near by tower. Two cell phones a block away won't communicate if there is no tower. (How could they bill you?)"
I don't know anything about the technology here, but can a cell phone alone be used as a transmitting device to communicate directly with a detonator?
"just turn off the towers."
Best point on this thread.