Nokia has released its Q1 2011 results, reporting an operating profit of €439 million (down 10% Year-on-Year), with net sales of €10.399 billion (up 9% YoY). Nokia’s device and service division’s profits were €439 million, down 10% from last year. Margins in devices and services were 9.8% (down 2.3% YoY and down 1.5% QoQ). Total converged devices sales (mainly Symbian-powered smartphones) were 24.2 million, compared with 21.5 million units in Q1 2010 (up 13% YoY) and compared with 28.3 million units in Q4 2010 (down 14%, QoQ). Worldwide smartphone market share was 26%, down 5% sequentially and 15% year on year. Read on for more analysis and more details.