David Cameron: I have never worn a watch or a wedding ring During the interview, he touched on education, mental health and the Olympics but at the end, the magazine's editors revealed he told the women he had worn neither a watch nor a wedding ring. But his admission that he never wore a watch surprised many commentators in light of his hectic schedule. Perhaps the Prime Minister has joined the growing number of people who rely on their smartphone for functions like the clock or calendar. According to O2, making a phone call was only the fifth most popular activity on a smartphone, with the average user spending around 15 minutes out of two hours on their phone each day. More than half of customers said they use their smartphone instead of an alarm clock, while almost half - 46 per cent - said their phone has replaced their watch. The Prime Minister is known to be a technology fan and has had his own personalised iPad app commissioned to keep him up-to-date with research and statistics from all Government departments. He is also one of the millions of users to have downloaded the Angry Birds game app.