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
SBA Communications 20,079 towers. The company also managed or leased approximately 4,800 actual or potential towers. In addition, it provides various site development services comprising network pre-design; site audits; identification of potential locations for towers and antennas; support in buying or leasing of the location; assistance in obtaining zoning approvals and permits; tower structure construction; antenna installation; and radio equipment installation, commissioning, and maintenance. SBA Communications Corporation was founded in 1989 and is headquartered in Boca Raton, Florida. The current CEO is Jeffrey A. Stoops. SBA Communications SBA Communications Corporation owns and operates wireless infrastructure, including small cells, indoor/outdoor distributed antenna systems,