A poll of nearly 1,500 people showed 82 per cent of them owned a mobile phone, with over half of them using it as an alarm clock.
Robert Egan, a fellow of the British Horological Institute, has witnessed the slide in their popularity.
"It is a trend that we are seeing, people are even using mobiles instead of wrist watches now.
"It's just another sign of modern technology taking over from mechanical things.
"I think in terms of travelling mobile phones are going to be the thing, these are changing times," he said.
The poll, carried out by Rightmobilephone.co.uk, showed one in five British people used handsets for the internet, organising their week, taking photos or films and waking up in the morning.