Nokia Chief Executive Stephen Elop promised to unveil a new smartphone using Microsoft's latest Windows 8 software soon, raising the prospect it will be launched in early September before rival Apple promotes its new iPhone.

Nokia, the world's second-largest cellphone maker, is fighting for survival after losing out to rivals in the lucrative smartphone business. Nokia lost 1.53 billion euros in the second quarter and sold just 4 million Windows phones in the period, well short of Apple's sales of 26 million iPhones and Samsung's 50 million smartphones.

The Finnish company will hold a trade show in Helsinki on September 5-6; the Nokia World Event comes only a week before an Apple event on Sept. 12, at which the U.S. competitor could announce a redesigned iPhone. Nokia has not commented on what it will announce at the Nokia World event, but business magazines have reported that the company will unveil the new Windows 8 smartphones.

Elop, in Oslo for a meeting with Telenor Chief Executive Jon Fredrik Baksaas, did not deny a September launch, saying only that Windows 8 smartphones will be released "relatively near term."

Nokia shares, which have been trading near all-time lows, rose sharply after Elop's comments and traded up 7.5 percent at 0924 GMT.

Elop, who came to Nokia from Microsoft in September 2010 to lead the company's battle against increasingly dominant Apple and Samsung, said he was sticking to his strategy of using Microsoft software despite the limited success of Windows Phones so far.

Nokia decided in early 2011 to ditch its home-grown Symbian software for a deal with Microsoft, aiming to catch up with Apple and Google in smartphones.

"I don't think about rewinding the clock and thinking about competing elsewhere," he told reporters.

"In today's war ... (between) Android, Apple and Windows, we are very clear, we are fighting that with the Windows phone."