I transferred to O2 from 3 on 2nd April 2022. My advise: do not use them. Dealing with them is absolutely awful. You cannot contact customer service. When you do eventually no solutions are offered & you are transferred around to different departments, none of whom can solve the issues. Currently I have no service (again) with them. I have asked for a PAC code, now received. I cannot wait to receive the start of service from a different supplier. I would advise any potential customers to think again about using this company. Totally appalling service.