Nokia will next week unveil a cheaper smartphone using Microsoft's Windows Phone software, Reuters reported today.

Cheaper phones could help Nokia and Microsoft win a larger share of the market.

In addition to the new Lumia 610 Nokia will also unveil at the Mobile World Congress trade show in Barcelona a global version of its high-end Lumia 900 phone, which AT&T is scheduled to roll out in the United States, the Reuters' sources added.