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 ...

Dropped calls, messages that won’t send and internet connection that grinds to a halt have become a frustrating fact of life for many people in one Welsh city. Two years after widespread complaints ...

An urgent warning has been issued to O2 customers as the mobile operator issues an important recall of five phone accessories. O2 says it has received a very small number of reports on a few faulty O2 ...