O2 (UK) O2 (UK) Telefónica UK Limited (trading as O2 – stylised as O) is a telecommunications services provider in the United Kingdom, owned by the Spanish multinational Telefónica, and is headquartered in Slough. With 25 million subscribers (as of December 2017), O2 is the second-largest mobile network operator in the United Kingdom after EE, with Vodafone in third place. O2 was formed in 1985 as Cellnet, a 60:40 joint venture between BT Group and Securicor. In 1999, BT Group acquired Securicor's share of Cellnet and the company was later rebranded as BT Cellnet. In June 2000, BT Cellnet launched the world's
Loud Tour Live at the O2 peaked at number eighton the UK Music Video Chart and number nine on the Irish Music DVDs Chart. The album was more successful in France where debuted and peaked at number two on the French Music DVD Chart. "Loud Tour Live at the O2" debuted at number 11 on the US "Billboard" Music Video Sales chart which was also its peak. Additionally, it peaked at number eight on the Australian Music DVD Chart. Loud Tour Live at the O2 Loud Tour Live at the O2 is the second live long-form video by Barbadian singer Rihanna. It was released on December