It is the mobile network service used by millions of people around the UK. But O2 has now issued a warning to customers ahead of a major change that will stop some phones from working. The UK's 3G ...

LONDON (Reuters) -Liberty Global said Britain's Virgin Media O2 - its joint venture with Telefonica - would still play a role in fibre consolidation after the Spanish company said a plan to spin off ...

People and businesses in the city of Manchester and key towns across Greater Manchester, including Wigan, Bolton, Rochdale, Oldham and Bury, can now access O2’s most advanced mobile network yet, ...