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
Partner Communications Company Partner Communications Company Partner Communications Company Ltd. () doing business as Partner (), formerly known as Orange Israel (), is a mobile network operator, internet Wi-Fi, fixed telephony service and OTT/IPTV provider in Israel. It was formerly operating under the Orange brand name until 16 February 2016. The company’s shares are traded on NASDAQ and the Tel Aviv Stock Exchange, where it is a constituent of the TA-25 Index; since August 2009, Scailex Corporation (owned by businessman Ilan Ben Dov) controls 51% of its shares. Partner Communications commenced full commercial operations in January 1999 and by 31 March 2001 had