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 ...

Mobile phone network operator O2 is urging customers to call a three-digit number and, if necessary, contact their bank as part of its latest alert. In a fresh wave of text messages and emails being ...

In late 2007, British cellular service provider O2 UK launched a six-month technology trial to gauge consumer interest in and comfort with using RFID-enabled mobile phones to make fare payments to ...