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
Kyocera Communications CDMA-based Push to talk service Sprint Direct Connect. In August 2014, Kyocera released the "Kyocera Brigadier", the first U.S. smartphone to be equipped with a display made of sapphire glass. Kyocera Communications Kyocera Communications, Inc. (pronounced like: key-oh-sarah) is an American manufacturer of mobile phones for wireless service providers in the United States and Canada. Kyocera Communications, Inc. is a wholly owned subsidiary of Kyocera Corporation, which also manufactures mobile phones for the Japanese wireless market under various brands. Kyocera Wireless, Inc. was originally formed in February 2000 when Kyocera acquired QUALCOMM's San Diego, California-based terrestrial handset division. Upon the