Mobile data usage such as Net access and e-mail is, unsurprisingly, up compared to last year.

A study by AT Kearney and the University of Cambridge found 53 percent of phones in a 4,000 mobile sample are data-enabled, compared to 49 percent in 2004. And those owners are increasingly using online services.

In 2004, a similar study found that 36 percent of data-enabled phone owners used such services, but this year 56 percent used the Internet or mobile e-mail at least once a month.

Many mobile phone users still say that they will continue to use their phones primarily for voice services, but use varies according to age. Eighty percent of those over 65 they use their phones only for voice. But that falls to 60 percent of 35 to 44-year-olds, and to 25 percent for under 24s.

One-third of multimedia phone owners in the study use MMS to send photos and video clips - up on last year but still far behind the texting SMS protocol, used by 90 percent of owners.

Music services are the big winner: 33 percent said they download music, compared to 21 last year.

Mobile phone users are generally concerned about the cost of data services, however. Half of mobile phone users in the study said they aren't willing to pay more than $5 a month on data services.

The study surveyed 4,000 users in 21 countries in Latin America, North America, Europe and Asia.