An Egyptian telecoms giant launched an advanced mobile phone network in North Korea on Monday, the latest attempt to introduce a global symbol of personal freedom into one of the world’s most tightly controlled societies. But analysts cautioned against reading too much into the widely publicized $400 million deal, first announced in January, for a third generation mobile network built by Orascom Telecom. Orascom Telecom Chief Executive Naguib Sawiris said the company’s aim was for a “network that will accommodate the 22 million people” in North Korea.