As the Mobile World Congress opens in Barcelona...Global Witness is calling on mobile phone manufacturers to audit their supply chains in order to exclude minerals financing the armed conflict in eastern Democratic Republic of Congo. There is a direct causal link between the metals trade in eastern DRC and atrocities perpetrated by armed groups against Congolese civilians. Recent work by Global Witness and the UN Group of Experts revealed that all of the main armed groups involved in the current fighting in eastern DRC finance themselves through the trade in high-value minerals. These minerals are processed into metals...used in the manufacture of mobile phones. [refers to Thailand Smelting and Refining Co (part of Amalgamated Metal Corporation Group - AMC Group)]