O2 (UK) cent share of Cellnet for £3.15 billion. Cellnet had five million customers at the time of its acquisition. The company was later rebranded as BT Cellnet , and it became a part of BT Wireless, a group of companies owned by BT. BT announced on 3 September 2001 that the BT Wireless business would be spun off from the main group as a newly listed holding company, mmO2 plc, operating under the "O2" brand. Shareholders approved the plan at an extraordinary general meeting on 23 October 2001. BT Cellnet relaunched as "O2" on 18 June 2002, along with other former
O2 (UK) their inception in 2005 until 2008. O2 is the sponsor of The O2 in London. Since its launch in 2007 the Millennium Dome has been transformed and rebranded by O2 into an entertainment venue. O2 customers can get "Priority Tickets" up to 48 hours before they are released to the general public. The O2 offers exclusive areas for O2 customers, including the "blueroom" bar and the "O2 lounge". Once inside, O2 customers can change their experience of these areas by dictating the wallpaper designs and jukebox requests through text. O2 also contributed 'O2 angels', a team of people trained to