UK

O2 UK, operating under Telefónica Europe in the United Kingdom, is a major mobile network provider serving millions of customers. As represented by its Mobile Country Code (MCC) of 234, placing it within the UK, and Mobile Network Code (MNC) of 10, O2 distinguishes itself within the competitive British telecommunications landscape. Alongside rivals like Vodafone, EE, and Three, O2 offers a range of services including 4G and increasingly prevalent 5G connectivity, catering to both individual consumers and business clients throughout England, Scotland, Wales, and Northern Ireland. Its widespread coverage makes it a key player in keeping the UK connected. O2's history is rich, evolving from BT Cellnet to becoming a standalone O2 brand, ultimately acquired by Telefónica. Over the years, O2 has built a reputation for innovation and customer focus, often recognized for its customer service initiatives and strategic partnerships to enhance network reach. The network often compete on innovative services in particular around inclusive roaming and data schemes. The brand remains a firmly recognised entity in the UK market, with a large customer base throughout the country.