To be honest this should be zero stars if there even was that option. Tried, for the second time, to cancel son’s broken, data only, phone having just paid the outstanding amount . Despite providing name on the account ( myself ) account nr, account bill, make of phone and phone nr I was told I failed security questions ! It beggars belief and am absolutely appalled ! O2, esp right now when in these uncertain times we all have to step up ( and I have signed up to go back to work even though I’m slightly terrified ) ought to really mind their customer service and really not be seen as unscrupulously making money at all cost !!!