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
BATM Advanced Communications BATM Advanced Communications BATM Advanced Communications Ltd. (Baras Advanced Technologies Marom) is a technology company principally engaged in development, production and marketing of data and telecommunication products in the field of local and wide area networks, as well as the development, production and distribution of laboratory diagnostic equipment in the medical sector. The company is listed on the London Stock Exchange and is a constituent of the FTSE techMARK 100 Index. BATM Advanced Communications was founded in 1992 by Dr. Zvi Marom and Greshon Baras as a bootstrap that grew into a multinational technology corporation; Initially focusing on developing high-performance