Telefónica Europe business was rebranded to 'O2 Online' which continues in the UK as a mobile communications service provider tied to the O2 UK network. The Genie portal properties were rebranded O2 Active in UK, Germany, Ireland and the Netherlands, and Genie Asia became O2 Asia. O2 Asia became a subsidiary of O2 UK for governance purposes. On 31 October 2005, O2 agreed to be taken over by Telefónica, a Spanish telecommunications company, with a cash offer of £17.7 billion, or £2 per share. According to the merger announcement, O2 retained its name and continued to be based in the United Kingdom,
The O2 Arena The O2 Arena The O2 Arena is a multi-purpose indoor arena located in the centre of The O2 entertainment complex on the Greenwich Peninsula in south east London. The arena was built under the former Millennium Dome, a large dome shaped building built to house an exhibition celebrating the turn of the third millennium; as the dome shaped structure still stands over the arena, "The Dome" remains a name in common usage for the venue. The arena, as well as the total O2 complex, is named after its primary sponsor, the telecommunications company O. The O2 Arena has the second