DNA has increased its profit outlook for 2017 as it bagged more Finnish customers using more data.
For the three months to the end of March, the operator's net sales were up 5.7 percent to €213.4 million.
The operator said mobile service revenues continued to grow off the back of continuing customer growth, with numbers up 3.8 percent to 2.7 million.
Its fixed network base, spanning voice, broadband and cable television, increased by 8,000 customers to 1.1 million.
ARPU also nudged up from €16.40 last year to €17.80 with customers opting to use more data in LTE networks.
Pre-tax profits were up 14.9 percent to €28.9 million, with EBITDA up 9.7 percent to €65.9 million.
CEO Jukka Leinonen highlighted the success of its network strategy, which shifted this year from coverage expansion to capacity. It said a shared network project in the north and east of Finland had led to new consumer and corporate customers.
He also highlighted DNA's Valokuitu Plus broadband product, offering gigabit speeds without changing a household's internal network.
He added: "In the first quarter, the Gigabit class speed became available to all 600,000 households in the DNA Valokuitu Plus network across Finland. DNA is among the first operators globally that is capable of providing Gigabit class broadband speeds in the entire network."
Leinonen also said preparation for future 5G networks would be a priority for the year ahead.
He said: "There are three important targets for 5G in the future: to enable a large-scale Internet of Things, to support highly reliable delay-critical connections, and to further increase the speed and efficiency of mobile broadband connections."