O2 (UK) BT subsidiaries: Esat Digifone in Ireland, Viag Interkom in Germany and Telfort Mobiel in the Netherlands. The rebranding was supported by a European advertising campaign, which began on 16 April 2002, across all four countries, at a cost of £130 million. The main launch campaign ran from 18 June and was developed by Vallance Carruthers Coleman Priest, working alongside brand consultancy Lambie-Nairn, creators of the "O2" brand identity. In March 2005, mmO2 restructured its shares and the company was relisted as O2 plc. On 30 November 2005, O2 agreed to a takeover by Telefónica, a Spanish telecommunications company, for £17.7
O2 (Ireland) Internet offered 1GB of data and 350 any network texts. Same terms applied as per Freedom talk. In December 2013 the data allowance of 1GB was increased to 7.5GB which O2 advertised as Unlimited Internet. Along with the new price plan O2 also launched a vast amount of prepay addons such as Talk, Text, Data, International Talk and International text. In 2010, O2 underwent a restructuring phase, implementing a number of cost-cutting measures which involved outsourcing internal divisions to external companies. O2's IT division was outsourced to IBM Ireland, while the "Network Operations" division was outsourced to BT Ireland ("who