O2 is the brand name promoted by Telefonica Europe plc in Ireland, United Kingdom, Germany, Czech Republic and Slovakia. Telefonica Europe plc is itself a subsidiary of the Spanish based Telefonica Group whose interests extend to the United States and a majority of Central and South American countries. o2 offer a wide range of services including mobile phone networks.

Headquarters: Madrid, Spain

Operates: GSM and UMTS cellular networks

Countries where the o2 brand is present:

• Czech Republic – o2.cc
• Germany – telefonica.de
• Ireland – o2online.ie
• Slovakia – sk.o2.com
• United Kingdom – o2.co.uk

Affiliated Enterprises:

• Spain – telefonica.es – Movistar and Terra
• Morroco – atento.ma
• United States of America -telefonica.com – Terra
• Mexico – telefonica.com.mx – Movistar and Terra
• Guatemala – telefonica.com.gt – Movistar and Terra
• El Salvador – telefonica.com.sv – Movistar and Terra
• Panama – movistar.com.pa – Movistar and Terra
• Puerto Rico – telefonica.pr /empresas – Terra
• Venezuela – movistar.com.ve – Movistar and Terra
• Colombia – telefonica .com.co – Movistar and Terra
• Ecuador – telefonica .com.ec – Movistar and Terra
• Peru – telefonica .com.pe – Movistar and Terra
• Chile – telefonicachile.cl – Movistar and Terra
• Argentina – telefonica .com.ar – Movistar and Terra
• Uruguay – telefonica .com.uy – Movistar and Terra
• Brazil – telefonica,com.br – Vivo and Terra

Click here to unlock a mobile phone locked on an o2-Mobile wireless network.