Waste of time and waste of money. No service at all just they want to charge you for nothing. I have been with 3 network for 11 years and with Vodafone for 10 years. Both of them best networks. As we use virginmedia broadband they offer me O2 line with I took two line for my family members. My contract with 3 was coming to end so I have decided to port my number to O2 and take new contract. I have given them all the requirements including PAC Code. I received SIM card after 4 days and 8 days gone still O2 cannot port my number every time they gave me 24 hours. They have already billed me as well for what I have not used due to their incompetence. Today when I called them they said that the contract is not in my name and cannot discuss it but when I insisted that I am the main account holder and I have another lines with O2 after checking she transferred me to different people without any help end up putting complaints. Even the were not able to assist when the number will be ported. Do not recommend O2 at all. I have 3 lines with O2 in few months contracts will be finishing will be big relief. For O2 my account is 1051547677