Vodafone says it saw a 30% increase in UK sales from data services in the last three months of 2008.
The increase was helped by greater mobile PC connectivity and mobile web services, said Vodafone.
However, a drop in voice revenue meant the company's UK arm saw a small year-on-year drop in overall sales, down 0.7% to £1.2bn.
Vodafone saw overall group revenue in the three months to 31 December grow 14% to £10.47bn, helped by acquisitions and currency fluctuations. But organic sales were actually down by 1%.
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The group had a global customer base of 289 million - up by 9.5 million. The struggling firm, which is making operating cuts across the group, does not publish profit and loss figures.