North Korea has disabled video camera and memory card functions in new mobile phones, a news report said Saturday, in what appears to be Pyongyang\'s latest move to tighten control over the flow of information within and across its borders. The North also removed the Bluetooth function, a protocol that allows mobile phone users to exchange data over short distances, and blocked subscribers from using mobile phones beyond the city where they are registered, Washington-based Radio Free Asia (RFA) reported, citing a Japanese journalist familiar with the issue.