I have contacted O2 regarding a WiFi calling on a certain phone I was interested in prior to becoming their customer through their live chat. (you can actually do that regardless if you are their customer or not, I have just input a random phone number and the website accepted it) . I was assured that the phone I asked has a WiFi Calling in 100% and the signal is good where I live. After that reassurance I have purchased the phone and left my current then provider just to find out on the same day the phone was delivered that I can't make any phone calls from where I live, and the phone actually does not support WiFi calling on O2. Have contacted O2 straight away, first through live chat and then over the phone (standing on the street at 8pm) and I was called a liar (between lines) by one of their customer assistants over the phone when I said O2 told me it is. They guy on the phone was saying I couldn't talk to anyone on the live chat before becoming an o2 customer and that they will not help me. So, I am stuck with them for two years with a phone that does not work at my place (luckily, I have contacted the phone manufacturer next day and they were very helpful and sorted the problem for me within 10 minutes). Horrible manners and customer service will change provider as soon my contract is up, will not accept and stand by rudeness.