Dont pay £1.75 for caller display. I recently changed over to o2 and was very disgruntled at having to pay for caller display. I came across an o2 webpage were it offers business landlines free caller display. I phoned custome srvice and told them it was an absolute disgrace. They told me that the £1.75 charge could not be removed, however, they would put a monthly credit of £1.75 onto my account.