I thought the cellular providers lead the way in customer service. Now I'm not sure about O2. My daughter purchased a phone fom them at Christmas on a tariff where the bill and the running total can only be viewed on-line. She has never been able to access her account on-line despite a number of e-mails back and forth with the replies usually taking around 5 days. She asked for my help, so I e-mailed explaining as clearly as possible the problem we were experiencing. The reply duly arrived 7 days later and I quote "we are sorry for the delay in replying to your query and assume that due to the time elapsed, you have now resolved the query. Presumably they think this will give them a further few days breathing space!