NOT HAPPY AT ALL I have recently joined O2 and have brought my number over from the other network. I was told it should up and running within 24 hours, but it took 30 hours, Then I discovered that the 4G network was not working so I called O2 customer service to find out what the problem was. I was told that the information transferred over from the other network had not transferred across correctly and this was the fault, it should be up and running within the next 12 hours, I was still waiting 2 days later, I called O2 again and asked for a new sim as the network was still not working. I received the replacement sim and 12 hours later it had started working (full service) I was happy. 28hrs later the network had been disconnected no voice, text and data services, so I called O2 again and this time I was told that the information was being transferred to the new SIM. I explained to the customer service person that the information had been transferred to the new sim and was working, (full service) now I have no service on my device, the same story again please wait 12 hours and it should be up and running... Guess what! still not working. After calling O2 several times to fix this problem. I was told that a mast was down and the engineers were fixing the problem this is a load of rubbish my friend is an O2 customer and her phone is working fine we both are in the same postcode region. I have been told to wait for another 24 hours for things to be up and running, I have 8 hours to go and my gut feeling is saying I don't think so. My advice is to strongly avoid O2 like the plague. This is a really bad company with customer service agents that have no clue with what they are doing but are happy to sell you a load of rubbish just to get you off the phone so that can move on to the next customer. I dislike giving companies bad reviews but this is ridiculous. The worst thing for me is I am stuck in a 12-month contract and if I want to end it I have to pay £155.6 so I can go to a better company. NOT HAPPY AT ALL.