North Korean produces Smartphone, but it does not provide internet service.

North Korean produces Smartphone, but it does not provide internet service.
If you buy Smartphone in North Korea, you can not get access to Internet service.
Why do they disconnect Internet service?
I think North Korean regime is afraid of the possibility that North Korean people use Internet service to know more about the outside the world.
If North Korean people use Internet service, then they will know how miserable their lives are.

http://www.asiatoday.co.kr/view.php?key=20170730000818234