A London School of Economics survey of young mobile-owning Brits showed the following:

“More than 45 per cent of mobile users access websites every day via
their mobile device, according to the survey, while a whopping 62 per
cent check emails daily and more than a fifth (24 per cent) have
subscribed to social networking on their phones….The survey also found the main barrier to mobile email and social
networking adoption is the perceived threat of high bills - with almost
half (41 per cent) of respondents saying they would be ‘very likely’ to
use the mobile internet more often if cost was not a factor.“