Updates stock price.Nokia ( NOK), the world's largest maker of mobile phones, reported second-quarter operating profit fell 71% to 427 million euros ($600.8 million) from 1.47 billion euros a year earlier. Sales fell almost 25% to 9.9 billion euros in the second quarter. Excluding certain items, operating profit for the handset maker declined 62% to 775 million euros. Net profit fell 66% to 380 million euros, down from 1.1 billion euros in the same period a year earlier. Nokia said it increased its share of the global mobile device market sequentially to an estimated 38%; its smartphone market share rose to an 41%. In a statement Thursday, Nokia said it expects mobile device volumes industrywide in the third quarter to be about the same or up slightly sequentially. Nokia expects its third-quarter share of the mobile devices market to be flat sequentially, and its 2009 market share to be flat vs. 2008, an update to its earlier target that it would increase market share this year.