O2 (UK) Telefónica O2 had a long-standing relationship with Arsenal F.C., being their shirt sponsor until the end of the 2005/2006 season. In 2005, a three-year deal was signed that saw Telefónica O2 become the team's exclusive mobile communications partner. O2 were the main sponsor of the Channel 4 reality TV show "Big Brother" from its second series (as BT Cellnet) in 2001 until its fourth series in 2003. They also sponsored the spin-off shows "Celebrity Big Brother 2" in 2002 and "" in 2003. In total O2 sponsored five series of the show. O2 sponsored music festivals, the Wireless Festivals, from
State Grid Corporation of China State Grid Corporation of China The State Grid Corporation of China (SGCC; ), commonly known as the State Grid, is the state-owned electric utility monopoly of China. It is the largest utility company in the world, and as of 2018, the world's second largest company overall by revenue. In 2016/17 it was reported as having 927,839 employees, 1.1 billion customers and revenue of 363.125 billion dollars. After the electricity "Plant-Grid Separation" reform in early 2002, the assets of State Electric Power Corporation (国家电力公司) were divided into the five "power generation groups" that retained the power plants and five regional subsidiaries