Nokia declared it was fighting back in its smartphone battle with Apple as it surprised investors with a stronger than expected jump in fourth-quarter profits.
Shares in the Finnish group surged 10 per cent on signs it was regaining lost ground in the growing market for devices such as the iPhone and Research in Motion's BlackBerry.
Nokia said it increased its share of the smartphone segment to 40 per cent in the fourth quarter, up from 35 per cent in the prior three months, after moves to shake up its product portfolio.
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