BBC: Finnish mobile phone company Nokia narrowed its losses in the first quarter of 2013, helped by rising sales of Lumia smartphones.
It reported a 339m euro (£290m) loss in the quarter, down from a 1.57bn euro loss in the same period last year.
Nokia is trying to catch up with rival smartphone makers Apple and Samsung.
Sales of Lumia handsets rose 27% to 5.6 million units in the January-to-March period, but total sales of Nokia mobile phones fell.
Nokia said mobile phone sales overall were down more than 30% to 1.59bn euros.
Lumia smartphones use Microsoft Windows software, after Nokia abandoned its own operating system two years ago. The company said it expected sales of Lumia to be higher than in the latest quarter.
Meanwhile its telecoms equipment venture Nokia Siemens Networks reported an unexpected fall in sales.
The company posted revenue of 5.85bn euros in the first quarter of this year, down from 7.35bn euros a year earlier.
"We have areas where we are making progress, and areas where we are further increasing the focus," said Nokia chief executive Stephen Elop, who was hired in 2010 to revive the company.
"For example, people are responding positively to the Lumia portfolio, and our volumes are increasing quarter over quarter.
"On the other hand, our Mobile Phones business faces a difficult competitive environment, and we are taking tactical actions and bringing new innovation to market to address our challenges," he added.
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