The company, a 50-50 joint venture between Sony Corp and LM Ericsson Telefon AB, said it shipped 51.2 million handsets last year, a 21% increase which keeps it as the fourth largest player in the market with a 7% market share.

Sony Ericsson had a rocky start that led to speculation that Ericsson might sell its stake to Sony. But it is now on a sound financial basis with net income for the fourth quarter up 161.8% to 144m euros ($174.9m) on sales 15.2% higher at 2.3bn euros ($2.79bn).