About us

O2 is a mobile network operator and the principal commercial brand of Telefónica UK Limited, which is part of the global telecommunications group Telefónica S.A, headquartered in Spain and operating in Europe, and North, Central and South America.

O2 was awarded Best Network Coverage in 2018 by uSwitch and with over 32 million connections to the network, it runs 2G, 3G and 4G services across the UK, as well as operating its nationwide O2 Wifi service.

The company is the network of choice for mobile virtual network operators such as giffgaff, Sky Mobile and Lyca Mobile as well as managing a 50:50 joint venture with Tesco for Tesco Mobile.

O2 has around 6,700 employees and over 450 retail stores and sponsors England Rugby, The O2 and 19 O2 Academy music venues across the UK. Through a comprehensive sustainability strategy O2 is also creating work experience opportunities for 16-24 year olds via its GoThinkBig platform, enabling customers to reduce their impact on the environment by recycling their old devices through O2 Recycle and, in partnership with the NSPCC, helping parents to keep their children safe online.

O2 is the only mobile operator in the 2018 Social Mobility Employer Index and was named as one of the best places to work in the 2018 Glassdoor Employee’s Choice Award.

Telefónica UK Limited is registered in England and Wales. Registration number: 1743099.

Its registered office is at: 260 Bath Road, Slough, Berkshire, SL1 4DX, United Kingdom.

About Telefónica

Telefónica has a significant presence in 24 countries with more than 343 million customers and 127 thousand employees. More information here.