North Korea has about 2 million cell phones, accessed by the wealthiest in the urban centers. “In a 14-month span between 2012 and 2013, the number of mobile-phone subscribers in North Korea doubled to two million from one million, and it now may exceed 2.5 million, according to Orascom Telecom Media & Technology Holding of Egypt, which provides cell service to North Korea in a joint venture...