Home and mobile broadband provider O2 signed up more than 63,000 customers to its high-speed packages in the last quarter.
The Telefonica-owned operator's latest financial release disclosed that in the three months up to March 31st 2009, the group took its overall DSL broadband UK user base to almost 404,500.
However, the Spanish group posted a disappointing four per cent revenue growth for the period.
Chief Executive of Telefonica Europe, Matthew Key, said: "In spite of a tough economic environment, we delivered a strong set of results in the first quarter in increasingly competitive markets."
Mr Key added that the group had been helped by its "constantly evolving range of innovative consumer and business propositions" and an increase in mobile broadband connections.
O2 currently offers a variety of home and mobile broadband packages ranging from its 8Mb £12.23 per month service to its 20Mb £22.02 monthly connection.