About us

About Telefónica UK / O2   

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

No.1 Network: O2 is the UK’s largest network with more than 34 million connections, providing 2G, 3G, 4G and 5G services while operating a nationwide O2 Wifi service.

For three consecutive years O2 has won Best Network Coverage provider at the publicly voted USwitch Awards (2018, 2019, 2020).  It won Best Network Performance at the Mobile News Awards 2019 and was named Most Reliable Network by GWS in 2020.

The company is the network of choice for mobile virtual network operators giffgaff, Sky Mobile and Lycamobile and manages a 50:50 joint venture with Tesco for Tesco Mobile.

O2 has led the industry with its commitment to Customer Fairness. Since 2013 O2 Refresh has split airtime and device costs so customers never pay for a handset they already own, and the evolution of customisable plans gives customers true flexibility over how they pay for their mobile phone. From exclusive Priority Tickets which provide customers with pre-sale tickets for The O2 and O2 Academy venues, 48 hours before everyone else, to England Rugby matches – who O2 have proudly been sponsors of since 1995.

O2 strives to do the right thing both as a business and for its customers.  It has committed to becoming net zero by 2025 and to working with supply chain partners to reduce carbon emissions by 30% in the next five years. The O2 Recycle scheme was named Best Recycle Service at the Mobile Industry Awards, and encourages customers to dispose of old devices responsibly.  Last year O2 was one of only three companies globally to be recertified at the highest level by the Carbon Trust Standard for reducing supply chain emissions.   Through its partnership with the NSPCC, since 2015 O2 has helped parents take over 7 million actions keep their kids safe online. In 2020 it became the only UK mobile network to sign up to The Conscious Advertising Network (CAN), a voluntary coalition of organisations set up to ensure that industry ethics catches up with the technology of modern advertising.

O2 has 6,500 employees across three main office sites and more than 440 retail stores, and was named a Best Place To Work in Glassdoor’s 2019 Employee’s Choice Awards.  Its industry-leading inclusive policies have seen it recognised with a National Inclusion Standard accreditation. In 2019 the company introduced 14 weeks’ paid paternity leave for heterosexual and same-sex couples, and it launched a toolkit for employees considering transitioning at work.  It is the only teleco named in the Social Mobility Employer Index for the last three years.

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.