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
PageOne Communications PageOne Communications PageOne is a British Messaging Solutions company based in Brentford, London. For over 25 years PageOne have provided tailored and bespoke messaging and communications services. PageOne also operate one of the largest public paging networks in the UK. PageOne also provide: PageOne was the first paging operator in Europe to use satellite links for the distribution of pager messages, the first company to forward emails to pagers, the first to launch 'Calling Party pays' Pagers and helped pioneer the use of SMS technology as part of organisational communications. As of 2009, PageOne is the first and only organisation