Appalling customer service. I would leave zero stars but had to select 1. The third party company these are recycling phones for Switch Up are ripping customers off. Hours and hours of calls and I cannot get past level 1 customer services which sounds like it is based in a foreign call centre. They refuse to provide details for head office. 2 online complaint forms completed to no avail. I have 2 more weeks before Ofcom can deal with my complaint. DO NOT SIGN UP TO O2!!!