Absolutely horrendous! If you are having problems with o2 like myself, ask them for ‘Direct Access Request’ and ask for all your transcripts from as far back as 6months and take it to the financial ombudsman. O2 are shocking! Their customer service are Asian and don’t have a clue on how to deal with things. The retention team are UK and at times no better. You get better support in store but they can only do so much. I have had nothing but stress since I joined them end of May. I was with virgin but they did a switch over to O2. Because of that I should get double data. Everyday I get emails saying thank you for your request and they remove all my double data and travel inclusive minutes. Then I get another email the next day saying thank you for your request and they put it back on then a few days later it starts up again. The funny thing is no request has been made! I upgraded my phones which are still in a box unused because after upgrading couldn’t receive incoming calls. Then when I thought it was resolved they cut off our network because they were sending eSIMs without explaining it takes 24hours & the most important part you need to set up your O2 app in order to get it. So went in holiday for one week with no network and no way for us as a family to contact each other outside of the hotel. I have had the most stressful 6weeks with them and am taking matters further as they have violated their contract on more than one occasion and the transcripts will prove it. I’m going to a better network once this is over. My personal opinion is to walk away from them but it’s each to their own!