O2 has apologised for a technical problem which caused users' phone numbers to be disclosed when using its mobile data. The company said it normally only passed numbers to "trusted partners". A ...

Mobile phone operator O2 admits some of its customers’ numbers have been exposed while they browsed the internet using their smartphones – but tells Channel 4 News the issue is now fixed. The numbers ...

O2 says it has now fixed a data breach which saw mobile internet users' phone numbers given out to websites. The mobile giant admits a technical glitch meant customers' numbers were sent to website ...

O2 may also be unwittingly assisting spammers, allowing them to match email addresses with phone numbers. See below for more updates. If you reside in the UK and you are one of the millions of ...