Nokia Corporation kicked off the world's largest mobile phone trade show by unveiling a new low-cost Windows smartphone that operators could give away free to customers, and another aimed at snap-happy consumers demanding better photo quality. Nokia launched its first Windows Phone in October, eight months after Elop announced a partnership with Microsoft, in a major strategy shift for the firm. Nokia said it would gradually replace its old Symbian software in its smartphones with the Windows operating system. The new phones were introduced less than three weeks after Nokia announced plans to stop assembling cellphones in Europe by the year-end as it shifts production to Asia and to cut another 4,000 jobs - its latest attempts to cushion itself from stiff competition in the smartphone sector. The job cuts follow nearly 10,000 layoffs that were announced last year.