O2 Group (Telefonica Europe)

O2 is a leading mobile phone brand, currently operating in five European markets including the UK and Germany. It was formed in 2001 from the demerger of the wireless businesses of UK fixed line operator BT Group. After several years of strong growth as an independent business it became the subject of multiple takeover bids in 2005, and was eventually acquired by Telefonica. It continues to operate as a distinct unit under the O2 name although it is now a full subsidiary of the Spanish group's mobile telecoms division.

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O2 Group website

O2	Tesco Mobile

Telefonica

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