Lost my phone and got o2 to block it. Phone unexpectedly recovered and the trouble I then had with o2 "live chat" and customer services (where staff gave out one lot of wrong information after another and where proper levels of training must be virtually non-existent) is not something I'd wish on anybody. I see o2 are getting hammered on customer service review pages and Trust Pilot and o2 management deserve all the criticism they get.