Nokia has struggled this year with falling sales and profits after the group said in February it would switch to Microsoft Corp software for its smartphones, but the first of these models will reach the market only later this year. Nokia's share price has halved since it announced the Microsoft deal on worries the company will lose so much market share before the new phones come out that it might never make up lost ground. The shares were down 1.1 percent at 4.132 euros by 0746 GMT, in line with a weaker European technology sector. Elsewhere Nokia supplier Digia said it had agreed to cut 170 jobs in its Finnish operations, and could cut up to 80 more as it revamped its business. Nokia also said it and Siemens AG will both inject 500 million euros ($680 million) into their 50:50 telecom gear venture Nokia Siemens Networks. Nokia also said Jesper Ovesen would take over as executive chairman of Nokia Siemens Networks, replacing former Nokia CEO Olli-Pekka Kallasvuo.