O2 (UK)

Contents
1985-1990	1985–1988	1988–1990	1990–1999	1999–2002	2002–present

Cellnet

1985-1990

1985–1988

1988–1990

1990–1999

BT Cellnet

1999–2002

In 1999, BT Group acquired Securicor's 40 percent share of Cellnet and the company was later rebranded as BT Cellnet.

O₂

2002–present

Designer:  Lambie-Nairn

Typography:  Frutiger

In 2001, BT Wireless demerged from BT and took the name mmO₂ plc. While mmO₂ plc was created in 2001, the O₂ consumer brand was introduced on 19 June 2002 in the United Kingdom, Germany, Ireland and the Netherlands (where it lasted for only a year before reverting to Telfort). The rebranding was supported by a European advertising campaign, which began on 16 April 2002 across all four countries. Lambie-Nairn created the O₂ brand identity.

Spanish telecommunications company Telefónica acquired O₂ in the United Kingdom, Ireland and Germany in early 2006.