O2 is the UK trading name of Spanish telecoms company Telefonica. It is the second-largest provider of mobile phone services in the UK. Here you will find ways of contacting the company’s customer service operatives.
Contact O2 by telephone
It is not easy to navigate through the O2 website to find phone numbers for customer support staff, but to make things easier and if you are an existing customer the customer support telephone number is 202. Before they answer your query, you will need to answer a security question. Otherwise try using 08442 02 02 02.
Contact O2 via internet
The O2 help centre can be found at O2. The site offers a live chat service, which should give you a flying start to getting your query resolved. Or if you prefer, you can try to work your way through online help articles you will find on the site. Should you prefer pen and paper, write to: O2 Correspondence Team, PO BOX 694, Winchester SO23 5AP. The site also provides a link where you can get information about making a complaint.