Finland's Nokia said its fourth-quarter results were better than expected and that the mobile

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phone business achieved underlying profitability, a rare spot of good news for the struggling handset maker.

Quarterly net sales in devices and services was about 3.9 billion euros. It sold a total of 86.3 million devices. Smartphones accounted for 6.6 million units, of which 4.4 million were Windows-based Lumia handsets, the company said.

Nokia shares surged 16 per cent to 3.48 euros by 1315 GMT.