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
GTT Communications GTT Communications GTT Communications, Inc. (GTT), formerly Global Telecom and Technology, is a multinational telecommunications and internet provider company with headquarters in McLean, Virginia. GTT operates a Tier 1 IP network, and provides IP transit, MPLS transport services, managed services, voice and unified communications to enterprise, government, and carrier customers in over 100 countries. In 1998, telecom services integrator and network solutions provider Global Internetworking Inc. was founded in McLean, Virginia. That same year, European Telecom and Technology was founded in London. In April 2005, Mercator Partners Acquisition Corp., a special purpose acquisition company created by Reston-based investment bank Mercator