Finnish phone giant Nokia has vowed to fight back as it battles for customers in the increasingly competitive smartphone market. The company unveiled three new smartphones - E7, C7 and an updated C6 - at London's Nokia World conference. Nokia is still the largest maker of smartphones but is facing stiff competition from the likes of Apple, Google and Blackberry maker RIM. Nokia's Niklas Savander told delegates the firm had been losing out to rivals. "That is about to change. Today we shift into high gear in Nokia's fightback to smartphone leadership," he said. According to research firm Comscore, Nokia's market share has fallen more than 14% since July 2009, although it still commands more than half the market in many western European countries. "In the last quarter people bought more Nokia smartphones than Apple and Android combined," Mr Savander told the annual Nokia World event in London. Market share Apple and Android devices have both grown by more than 5% in the last 12 months Comscore says, but both still command less than half of Nokia's market share. Nokia said it currently sells around 260,000 smartphones every day. "That's more smartphone sales than any other company by far. Period," said Mr Savander. However, he admitted that the firm was going through a "tough, challenging transition" and still had a lot of work to do. The talk followed a period of turmoil for the firm. On 10 September, it announced that it would replace it's chief executive Olli-Pekka Kallasvuo with Microsoft's Stephen Elop. And on Monday, Anssi Vanjoki, the head of Nokia's mobile business, resigned after just two months in the job. On stage, Mr Vanjoki said little about his decision, merely acknowledging that his talk was his last Nokia event and thanking the company and its customers for the last twenty years. He also took time to reflect on Nokia's current position. "We have taken some knocks over the last few years but we have positioned Nokia for the future," he said. He used his time to introduce Nokia's new line up of smart phones. The C6, C7 and E7 devices all run on Symbian, the most widely used mobile operating system in the world.