I have had the worst customer service from O2 that I have ever had with ANY company EVER. I would urge anybody to consider any other network than O2, purely because it is just NOT WORTH IT! 2 hours 50 minutes to set up a new SIM - it turns out they can't do it; the live chat just talks in circles on a script without any ability to help, the phones keep hanging up, the website is utterly ridiculous for navigating - how is this company operating?? I have given up and will move to The instead - BUT I am now having to request a new SIM, in order to activate it, in order to get a PAC code, in order to leave O2 once and for good! CAN'T BELIEVE IT! I would never even bother to waste my time by writing a review like this, but I just HAD to express how much I HATE O2! If you can't provide any reliable type of customer service, then don't scale up your business. O2 deserves to be run out of a shed with 2 employees. Don't waste your time with them.