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
Rochester Telephone Corporation for resale. In their early years, the company's subsidiaries reported strong profits. In 1983, as the federal government's breakup of the Bell telephone monopoly increased competition in the telecommunications industry dramatically, Rochester Telephone launched its second unregulated venture, founding the RCI Corporation. RCI installed a microwave communications network in New York State and a fiber optic hookup with Chicago. After purchasing an additional fiber optic link with Washington, D.C., the company's operations spanned 12 cities. In the mid-1980s, Rochester Telephone also entered the new radio telephone industry, when it founded Rochester Tel Mobile Communications. By the end of the decade,