"In the past five years it has represented Greece, the Republic of Congo and the Ivory Coast." These include: Advised Argentina in the 2005 restructuring of its $81.8 billion global debt, and in 2012 it represented Greece in the largest ever sovereign-debt restructuring and the largest ever bond exchange. But in 2014, a number of commentators criticized the firm severely for its handling of the Argentinian debt case. In 2011, represented the Chinese company Sichuan Hongda Group in its $3 billion investment in Tanzania, a joint venture with Tanzania's National Development Corporation (NDC) that constituted the largest investment venture in East Africa to date. In 2007, legal adviser to T-Mobile in its $2.4 billion merger with SunCom Wireless. Defended the Republic of Congo in litigation in the United States arising from attempts to garnish Congo's oil royalties. Represented Mittal Steel Czech subsidiary in ICC arbitration claim brought by Dutch contractor. Advised Google in its acquisition of Motorola Mobility. In 2012, provided legal counsel to T-Mobile US and Deutsche Telekom in connection with T-Mobile US's merger with Sprint Corporation. In 2012, international counsel to The Hellenic Republic in connection with its invitation, launched on February 24, relating to approximately €206 billion face amount of Greek bonds held by private sector holders, the largest ever sovereign debt restructuring and the largest ever bond exchange. In 2014, represented Russia in the case of Yukos, a company that the Russian government had broken up in 2003, after arresting its owner, Mikhail Khodorkovsky, on charges of tax evasion. Courts in several countries later ruled that the Russian government's real intent was to destroy Yukos, seize its assets, and punish Khodorkovsky, a political enemy. The largest arbitration award in history, $50 billion, was won by Yukos' former owners against Russia. In April 2016, a Dutch Court of the Hague overturned the award. In 2014, retained by the government of Puerto Rico, to help in the restructuring of its $72 billion public debt In 2017, represented The Dow Chemical Company on the antitrust aspects of its $130 billion merger of equals with DuPont, the third-largest ever. In 2018, represented the Walt Disney Company and 21st Century Fox on antitrust matters related to Disney’s $71.3 billion acquisition of 21st Century Fox assets. In 2018, advised on the $146 Billion Sprint T-Mobile merger. Buchheit and collective action "Much of Cleary Gottlieb's success in sovereign debt," according to Reuters, "is