A quarter of teenagers (26%) had been late for school and 60% said they had neglected school work, but 61% said their parents had taken their device away or restricted their time on it.
A quarter of adults have sent a text or instant message to friends or family while in the same room.
But a quarter of adults also complained that someone bumped into them in the street at least once a week because they were looking at their phones, and 40% felt a friend or relative had ignored them at least once a week because they were too engrossed in their device.
Of those who had taken time away from the internet, 25% left it for up to a day, 20% took up to a week and 5% took up to a month away, with most (44%) saying they wanted more time to do other things and 38% needing more time to talk to friends and family.
However, while 33% felt more productive as a result, 27% found it liberating and 25% enjoyed life more, 16% experienced a “fear of missing out”, 15% felt lost and 14% felt “cut-off”.
Almost a third of UK holiday-goers (30%) have purposely abandoned technology, with 16% choosing a destination with no internet access and 9% travelled to a place with no internet or phone coverage.
Jane Rumble, director of market intelligence at Ofcom, said: “The internet has revolutionised our lives for the better. But our love affair with the web isn’t always plain surfing, and many people admit to feeling hooked.
“So millions of us are taking a fresh look at the role of technology in our lives, and going on a digital detox to get a better tech-life balance.”